How to choose the best method for solving simultaneous equations

Understanding Simultaneous Equations

**

**

Unravel the Mystery: Solving Simultaneous Equations in Secondary 3 Math!

Imagine you're in a bustling hawker centre, and you want to buy lunch and dinner from your favourite stalls. You have $10 and you know the price of lunch is $3 more than dinner. How much did you spend on dinner? This, my friends, is a simple example of a simultaneous equation! Let's dive into the exciting world of secondary 3 math and unravel these mysteries together.

What are Simultaneous Equations?

Simultaneous equations are like a pair of friends who always arrive at the same place at the same time. They are two or more equations that share the same variables, and you need to solve for those variables. In Singapore's demanding secondary-level learning framework, pupils gearing up for O-Level exams commonly encounter intensified difficulties regarding maths, including higher-level concepts such as trigonometry, introductory calculus, plus geometry with coordinates, that require strong understanding of ideas plus practical usage. Guardians regularly seek specialized support to make sure their teenagers can cope with program expectations while developing assessment poise via focused exercises plus techniques. JC math tuition provides vital bolstering with MOE-aligned curricula, qualified tutors, and resources like old question sets plus simulated exams to tackle unique challenges. The initiatives highlight issue-resolution strategies and time management, helping learners secure improved scores on O-Level tests. Ultimately, investing into these programs also readies learners for country-wide assessments but also establishes a strong base for further education in STEM fields.. In the math world, they're as common as kopi O in Singapore!

Why are they important in secondary 3 math?

Simultaneous equations are like the MRT system in Singapore – they connect different parts of your math knowledge. In secondary 3, you'll use them to solve problems involving linear graphs, quadratic equations, and more. Plus, they're a crucial stepping stone to higher-level math topics like matrices and vectors. So, let's make sure we master them!

Fun Fact: The Birth of Simultaneous Equations

Did you know that the first recorded simultaneous equations were found in a Chinese math book from the 3rd century? The author, Sun Tzu, used them to solve a problem about dividing inheritance. Talk about a historical 分家 (hěn-gâ) situation!

Solving Simultaneous Equations: Methods to the Rescue!

Now, let's explore two popular methods to solve simultaneous equations: the Substitution Method and the Elimination Method. Think of them as two different rojak recipes – they use different ingredients (methods) but result in the same delicious dish (solution).

Substitution Method Solve one equation for one variable, then substitute that expression into the other equation. In the Republic of Singapore's secondary education environment, the move from primary to secondary school introduces pupils to higher-level abstract maths principles including algebra, geometric shapes, and statistics and data, which may seem intimidating lacking suitable direction. Many guardians acknowledge this key adjustment stage needs additional strengthening to enable young teens adapt to the heightened demands while sustaining excellent educational outcomes within a merit-based framework. Building on the foundations laid during PSLE readiness, targeted programs become crucial for addressing individual challenges and encouraging independent thinking. JC 2 math tuition provides customized classes matching the MOE syllabus, integrating interactive tools, worked examples, and practice challenges to make learning stimulating and impactful. Qualified educators emphasize closing learning voids from earlier primary stages and incorporating approaches tailored to secondary. Finally, such initial assistance also enhances grades plus test preparation while also develops a deeper interest for mathematics, readying learners for achievement in O-Levels and further.. It's like solving a puzzle, piece by piece! Elimination Method Make one variable 'disappear' by adding or subtracting the equations. It's like playing a game of hide and seek, but with variables!

Interesting Fact: Simultaneous Equations in Real Life

Simultaneous equations aren't just math problems; they're everywhere! They help meteorologists predict weather patterns, engineers design buildings, and economists forecast market trends. So, the next time you enjoy a cool ice kacang, remember you're enjoying the fruits of simultaneous equations!

Tips for Mastering Simultaneous Equations

  • Practice, practice, practice! The more you solve, the better you'll become.
  • Check your work carefully. Make sure your solutions make sense in the context of the problem.
  • Don't be afraid to ask for help! If you're stuck, reach out to your teacher or a helpful classmate.
  • In Singaporean challenging secondary-level learning environment, the move out of primary education introduces learners to increasingly intricate maths principles including basic algebra, integers, and principles of geometry, which often prove challenging absent proper readiness. Many families focus on supplementary learning to fill potential voids and foster a love for the subject from the start. best maths tuition centre delivers targeted , MOE-aligned classes using qualified instructors who emphasize analytical techniques, personalized feedback, plus interactive exercises to build basic abilities. Such programs often feature limited group sizes for improved communication and frequent checks to track progress. Ultimately, putting resources in these foundational programs also improves educational outcomes while also prepares early teens for advanced secondary hurdles and long-term success within STEM disciplines..

So, are you ready to tackle those simultaneous equations like a Singaporean champion? With practice and patience, you'll be solving them like a pro in no time! Now, go forth and conquer those equations, one step at a time!

**

**

" width="100%" height="480">How to choose the best method for solving simultaneous equations

Graphical Method: A Visual Approach

**

Graphing Our Way to Solutions: A Hands-On Approach

** *

Imagine you're Singapore's very own Sherlock Holmes, but instead of solving mysteries with a magnifying glass, you're armed with a pencil, paper, and a ruler. Welcome to the world of solving simultaneous equations using the graphical method!

* **

What are Simultaneous Equations?

** *

You're probably familiar with single equations, like 2x + 3 = 11. But what if you have two equations with two variables, like this:

* **

1. 2x + 3y = 17
2. 4x - 2y = 8

** *

These are simultaneous equations, and they're a breeze to solve with the graphical method, which is part of the Secondary 3 Math Syllabus (Singapore).

* **

Plotting the Way: Graphing Our Equations

** *

First, let's plot the lines representing each equation on the same coordinate plane. Remember, every point on the line satisfies the equation. Here's how you can do it:

* **

    ** **
  1. Find the y-intercept (where the line crosses the y-axis) for each equation.
  2. ** **
  3. Find two other points on each line by choosing different x-values.
  4. ** **
  5. Plot these points and draw the lines.
  6. ** **

** In Singapore's organized secondary-level learning framework, Secondary 2 pupils begin handling increasingly complex maths subjects like equations with squares, congruence, and statistical data handling, which expand upon Sec 1 foundations and equip for upper secondary demands. Families frequently search for supplementary tools to enable their teens adjust to this increased complexity and maintain consistent progress amidst educational demands. Singapore maths tuition guide provides customized , MOE-compliant sessions featuring experienced educators who use engaging resources, everyday scenarios, plus targeted exercises to bolster understanding and exam techniques. Such lessons foster self-reliant resolution and handle specific challenges like algebraic manipulation. In the end, this focused assistance boosts comprehensive outcomes, alleviates stress, and creates a firm course for O-Level success and future academic pursuits.. *

Fun Fact: Did you know that the graphical method has been around since the 17th century? It was first used by René Descartes, a French philosopher and mathematician, to solve equations. He's often called the "father of modern philosophy" and "father of modern mathematics".

* **

Finding the Solution: The Magic Intersection

** *

Now, look at your graph. If the two lines intersect at exactly one point, that's your solution! In the bustling city-state of Singapore's high-speed and educationally demanding landscape, families acknowledge that building a strong academic foundation as early as possible leads to a major effect in a kid's long-term achievements. The progression leading up to the PSLE commences well ahead of the final assessment year, as early habits and skills in disciplines like math set the tone for more complex studies and problem-solving abilities. By starting readiness efforts in the first few primary levels, learners are able to dodge typical mistakes, develop self-assurance over time, and cultivate a optimistic mindset towards tough topics that will intensify in subsequent years. math tuition centers in Singapore plays a pivotal role within this foundational approach, delivering child-friendly, interactive lessons that introduce fundamental topics such as basic numbers, shapes, and easy designs aligned with the Ministry of Education syllabus. The initiatives utilize fun, engaging techniques to ignite curiosity and stop learning gaps from forming, promoting a seamless advancement into later years. Finally, committing in these beginner programs not only eases the burden associated with PSLE and additionally equips kids for life-long analytical skills, offering them a competitive edge in Singapore's meritocratic system.. The x-coordinate of the intersection point is the value of x, and the y-coordinate is the value of y. If the lines don't intersect (they're parallel), there's no solution.

* *

What if the lines intersect at more than one point? Then the equations have infinitely many solutions – you'll get a whole line of solutions!

* **

The Limitations: When Graphs Won't Help

** *

While the graphical method is a powerful tool, it's not perfect. It can't help us solve equations with fractional coefficients or non-linear equations. For example, it can't solve this:

* **

1. 2x + 3y = 17
2. x^2 + y^2 = 1

** *

For these, we'll need to use other methods, like substitution or elimination, which are also part of the Secondary 3 Math Syllabus (Singapore).

* **

Equations and Inequalities: The Cousins We Can't Forget

** *

Before we wrap up, let's not forget about inequalities! The graphical method works for them too. Instead of a single point or line, we get a shaded region representing all the solutions. Isn't that canola (cool)?

* **

A Journey into More Adventures

** *

You've just scratched the surface of the graphical method, but there's so much more to explore! From systems of linear inequalities to the fascinating world of functions and graphs, the journey of learning math is like a kaypoh (curious) explorer's adventure. So, grab your pencil and paper, and let's continue this journey together!

* **

"Mathematics is a game, played according to certain simple rules with no elements of luck." – Alfréd Rényi, Hungarian mathematician.

**

Substitution Method: Step-by-Step

Understanding Simultaneous Equations

Simultaneous equations are sets of equations where two or more equations share the same variables. They are commonly encountered in secondary 3 math syllabus in Singapore, as taught by the Ministry of Education. Each equation represents a different relationship between the variables, and the goal is to find values that satisfy all equations simultaneously.

Applying the Substitution Method

The substitution method is a straightforward approach to solve systems of linear equations. As the city-state of Singapore's educational system imposes a heavy focus on math mastery early on, guardians have been progressively favoring structured help to help their youngsters handle the growing difficulty in the syllabus during initial primary levels. By Primary 2, students face progressive concepts such as addition with regrouping, introductory fractions, and quantification, which develop from core competencies and prepare the base for higher-level issue resolution needed in later exams. Acknowledging the importance of regular strengthening to avoid beginning challenges and foster interest toward math, a lot of opt for specialized courses in line with Singapore MOE directives. 1 to 1 math tuition provides focused , dynamic sessions developed to render such ideas accessible and enjoyable using interactive tasks, graphic supports, and individualized feedback from skilled instructors. This strategy doesn't just aids primary students overcome immediate classroom challenges but also builds analytical reasoning and resilience. In the long run, these initial efforts contributes to smoother academic progression, reducing pressure as students prepare for benchmarks like the PSLE and creating a positive path for ongoing education.. It involves turning one equation into an expression for one of its variables, and then substituting this expression into the other equation. This method works best when one equation has a variable isolated on one side, making it easy to express that variable in terms of the other.

Step-by-Step Substitution

Let's consider an example: 2x + y = 6 and x - y = 3. First, solve one equation for one variable. From the second equation, we get y = x - 3. Now, substitute this expression for y into the first equation: 2x + (x - 3) = 6. Simplify and solve for x, then substitute back to find y.

Solving for Both Variables

After finding the value of one variable, substitute it back into either of the original equations to find the other variable. In our example, once you've found x, substitute it back into y = x - 3 to find y. This will give you the ordered pair (x, y) that satisfies both original equations.

Checking Your Solution

Always remember to check your answer. In the city-state of Singapore, the schooling system concludes early schooling years with a national examination that assesses students' educational accomplishments and determines placement in secondary schools. This exam occurs annually to candidates during their last year in primary school, focusing on key subjects for assessing general competence. The Junior College math tuition serves as a reference point for placement to suitable secondary programs according to results. The exam covers disciplines including English, Mathematics, Sciences, and Mother Tongue, featuring structures refreshed occasionally to match academic guidelines. Grading is based on performance levels ranging 1-8, such that the total PSLE Score represents the total of per-subject grades, influencing long-term educational prospects.. Substitute the ordered pair (x, y) back into both original equations to ensure that they hold true. If both equations are satisfied, then your solution is correct. If not, go back and recheck your steps. This is a crucial step often missed by students, but it's a good habit to ensure accuracy.

Elimination Method: Another Way Through

**

Solving Simultaneous Equations: The Elimination Method's Magic Trick

** Alright, imagine you're a secret agent on a mission to crack a complex code. The code is made up of two equations, and you need to find the secret numbers (variables) that will unlock the safe. Sounds like a thrilling movie scene, right? Well, today we're going to learn a powerful method to solve such 'codes' - the Elimination Method, a staple in Singapore's secondary 3 math syllabus. **

What are Simultaneous Equations?

** Before we dive into the Elimination Method, let's ensure we're on the same page. Simultaneous equations are like a pair of equations that depend on the same variables. They're like two puzzles that you need to solve together to find the missing pieces. For example: 1. Equation 1: 3x + 2y = 13 2. Equation 2: 2x - 3y = 1 **

Fun Fact: The History of Simultaneous Equations

** Did you know that simultaneous equations have been around since the 16th century? They were first introduced by the French mathematician François Viète. He used them to solve problems related to astronomy. Isn't it fascinating how math has been helping us explore the universe for centuries? **

Enter the Elimination Method

** The Elimination Method is like having a secret decoder ring for solving simultaneous equations. It's a simple yet powerful technique that helps us isolate one variable and solve for it. In Singapore's challenging academic framework, year three in primary represents a significant change where pupils dive more deeply into topics including times tables, fraction concepts, and fundamental statistics, expanding upon earlier foundations in preparation for higher-level problem-solving. Many guardians notice that school tempo on its own might not be enough for all kids, motivating them to seek supplementary help to nurture math enthusiasm and stop initial misunderstandings from forming. During this stage, tailored educational support is crucial in keeping academic momentum and promoting a positive learning attitude. best maths tuition centre offers concentrated, MOE-compliant instruction through group sessions in small sizes or individual coaching, emphasizing problem-solving methods and graphic supports to demystify complex ideas. Instructors often incorporate game-based features and ongoing evaluations to measure improvement and enhance drive. Ultimately, such forward-thinking action not only improves current results but also builds a strong base for excelling during upper primary years and the final PSLE exam.. Here's how it works: **

Step 1: Make the Coefficients of One Variable the Same

** In our example, the coefficients of 'x' are 3 and 2. We can make them the same by multiplying the second equation by 3/2. This gives us: 1. 3x + 2y = 13 2. (3/2)(2x - 3y) = (3/2)(1) Simplifying the second equation, we get: 1. 3x + 2y = 13 2. 3x - 4.5y = 1.5 **

Step 2: Eliminate One Variable

** Now, let's add these two equations together to eliminate 'y'. This gives us: (3x + 2y) + (3x - 4.5y) = 13 + 1.5 Simplifying, we get: 6x = 14.5 **

Step 3: Solve for the Variable

** Now, we can solve for 'x' by dividing both sides by 6: x = 14.5 / 6 x = 2.4166... **

Interesting Fact: Equations and Inequalities

** The Elimination Method isn't just limited to equations with two variables. You can use it to solve systems of equations with more variables too! Plus, it works with inequalities as well. Isn't that cool? **

What if...?

** What if you're working with equations that have fractions? No worries! You can convert them into improper fractions or use the Elimination Method with fractions. The process is the same, just a bit more complex. **

Navigating the Singapore Math Scene

** The Elimination Method is a crucial part of Singapore's secondary 3 math syllabus. It's a powerful tool that helps students solve complex problems. So, if you're a parent supporting your child's math journey, remember to encourage them to practice and master this method. **

Call to Action: Give It a Try!

** Now that you've learned the Elimination Method, it's time to put it to the test! Try solving some simultaneous equations on your own. You can use our example as a guide. Remember, practice makes perfect. So, keep at it, and you'll be solving equations like a pro in no time!

Comparison of Methods: Pros and Cons

**

Solving Simultaneous Equations: A Parent's & Student's Guide to Singapore's Math Syllabus

** **

Embarking on Our Math Adventure: The Mysterious Equations

** Imagine you're in a bustling Singaporean market, like Tekka Market, and you're trying to buy two different fruits, apples and oranges, with a total of $10. But here's the twist - you must buy at least 3 apples and 2 oranges. How many of each fruit should you buy? Welcome to the world of simultaneous equations! **

Method 1: Graphical Method - The Visual Detective

**


**

Pros

**

  • Easy to understand and visualise, especially for secondary 1 students new to equations.
  • Great for identifying integer solutions quickly.

**

Cons

**

  • Not suitable for finding exact decimal solutions.
  • Can be messy and time-consuming for complex equations.

**

Fun Fact

** Did you know? The graphical method has its roots in ancient China, where mathematicians used it to solve practical problems like dividing inheritances! **

Method 2: Substitution & Elimination - The Sherlock Holmes of Math

**


**

Pros

**

  • Can find exact solutions, both integer and decimal.
  • Useful for complex equations with many variables.

**

In the Republic of Singapore's achievement-oriented education structure, the Primary 4 stage functions as a pivotal transition where the syllabus becomes more demanding featuring subjects such as decimals, balance and symmetry, and elementary algebraic ideas, testing students to apply logic via systematic approaches. A lot of parents realize that school lessons by themselves might not fully address unique student rhythms, leading to the pursuit for supplementary tools to strengthen topics and sustain sustained interest in math. As preparation toward the PSLE builds momentum, regular practice proves vital in grasping those core components without overwhelming young minds. Singapore exams delivers tailored , dynamic tutoring adhering to MOE standards, including everyday scenarios, riddles, and tech aids to render theoretical concepts tangible and exciting. Qualified tutors prioritize spotting areas for improvement early and transforming them into assets via gradual instructions. Eventually, this investment builds tenacity, higher marks, and a effortless shift to advanced primary levels, setting students along a route toward educational achievement..

Cons

**

  • Requires careful planning to avoid complex fractions.
  • Can be confusing for secondary 3 students or those new to the method.

**

Interesting Fact

** What if we told you that the elimination method was used by none other than Sir Isaac Newton to solve simultaneous equations? Yes, even the great minds needed a helping hand! **

Method 3: Matrix Method - The Tech Whizz of Math

**


**

Pros

**

  • Can solve systems of equations with many variables.
  • Great for understanding linear equations and matrices in higher math levels.

**

Cons

**

  • Requires understanding of matrices and determinants, which can be challenging for secondary 1 students.
  • Not suitable for non-linear equations.

**

History Lesson

** Did you know that the matrix method was first used by the Scottish mathematician Arthur Cayley in the 1850s? It's like finding a secret shortcut in the bustling streets of Singapore! **

Choosing Your Method: Like Choosing Your Hawker Centre Dish

** Which method to choose depends on the equation and your comfort level. Remember, there's no one-size-fits-all answer, just like there's no single best dish at a hawker centre. So, go ahead, explore, and enjoy your mathematical feast!

Graphical Method

This method involves plotting the points for each equation on a graph and finding the point of intersection. It's suitable when coefficients are small integers and doesn't require algebraic manipulation.

Elimination Method

This method involves adding or subtracting equations to eliminate one variable. It's suitable for systems with coefficients that are opposites of each other or when one equation is a multiple of the other.

Matrix Method

This method uses matrices to solve systems of equations. It's a more advanced method that can solve systems with any number of variables but requires understanding of matrix operations.

Substitution Method

In this method, one equation is solved for one variable and then substituted into the other equation. It's useful when one equation is a simple linear equation.

Graph of simultaneous equations

Real-World Applications: Solving Together

**

Navigating the Math Maze: Solving Simultaneous Equations

**

Imagine you're in a bustling Singapore hawker centre, like Tiong Bahru Market, and you're craving both lor mai kai and chwee kueh. You have $5 and each dish costs $2.50. How much change should you expect back? This is where simultaneous equations come into play, secondary 3 math syllabus Singapore style!

**

What are Simultaneous Equations?

**

Simultaneous equations are like a pair of equations working together to solve a problem. They're like having two math detectives, each holding a piece of the puzzle, working together to solve a case. In our hawker centre example, one equation represents the total cost of your meal, and the other represents the change you receive.

  1. Total cost = $5
  2. Change = Total cost - (Cost of lor mai kai + Cost of chwee kueh)

**

Graphing the Solution

**

To solve these equations, we can use a method called graphing. Imagine plotting the two equations on a coordinate plane, with one axis representing the cost of lor mai kai and the other representing the cost of chwee kueh. The point where the two lines intersect gives us the solution!

Graph intersecting at (2.5, 2.5), signifying $2.50 for each dish.

**

Fun Fact: The History of Simultaneous Equations

**

Did you know that the concept of simultaneous equations dates back to ancient times? The Babylonians and Ancient Egyptians used systems of linear equations to solve practical problems, like dividing fields or allocating rations.

**

Solving Inequalities: A Sister Skill

**

While we're on the topic of equations, let's not forget their sister skill - solving inequalities. Inequalities are like equations, but they allow for more than one solution. They're like having multiple hawker stalls selling the same dish, each with a slightly different price. You just need to find the range of prices that satisfy the inequality.

**

What if...?

**

What if the hawker centre only accepted exact change? As Primary 5 ushers in a elevated degree of difficulty within Singapore's mathematics syllabus, including topics like ratio calculations, percentages, angle studies, and complex verbal questions calling for more acute analytical skills, families frequently search for approaches to ensure their youngsters keep leading while avoiding frequent snares in comprehension. This phase is critical as it seamlessly links to PSLE preparation, in which built-up expertise is tested rigorously, making early intervention essential in fostering resilience in tackling step-by-step queries. As stress building, expert support helps transform likely irritations into chances for development and mastery. h2 math tuition provides learners using effective instruments and customized mentoring matching Singapore MOE guidelines, utilizing methods such as visual modeling, bar charts, and practice under time to clarify intricate topics. Committed educators emphasize conceptual clarity instead of memorization, promoting interactive discussions and mistake review to build confidence. Come the year's conclusion, students usually demonstrate marked improvement for assessment preparedness, opening the path to a smooth shift to Primary 6 and further amid Singapore's rigorous schooling environment.. You'd need to plan your meal carefully, ensuring you have the right amount of money. This is where understanding simultaneous equations and inequalities can help you plan and make better decisions in real life.

**

Secondary 3 Math Syllabus Singapore: Let's Practice!

**

Now that you've seen how simultaneous equations can help you navigate the math maze, it's time to practice! Grab your math workbook or head to myMaths.sg to solve more equations. Who knows, you might just find a new favourite dish at the hawker centre!

Common Pitfalls and Tips for Success

**HTML Fragment:**

Tackling Simultaneous Equations: A Parent's & Student's Guide

Fun Fact: Did you know? The concept of solving simultaneous equations dates back to ancient times, with evidence found in the works of Egyptian and Babylonian mathematicians around 2000 BCE!

Understanding Simultaneous Equations

Simultaneous equations are like a math dance, where variables move in sync to reach a solution. In the city-state of Singapore's pressure-filled scholastic setting, the Primary 6 year represents the final phase for primary-level learning, in which students bring together prior education in preparation for the vital PSLE exam, facing intensified concepts including advanced fractions, geometric demonstrations, problems involving speed and rates, and thorough review techniques. Families commonly notice the escalation in difficulty can lead to anxiety or comprehension lapses, particularly regarding maths, motivating the requirement for professional help to polish skills and exam techniques. At this critical phase, where every mark counts in securing secondary spots, extra initiatives prove essential for focused strengthening and building self-assurance. Math Tuition Singapore provides rigorous , PSLE-oriented lessons in line with up-to-date MOE guidelines, featuring simulated examinations, mistake-fixing sessions, and adaptive teaching methods to handle personal requirements. Experienced instructors emphasize time management and advanced reasoning, aiding pupils tackle challenging queries smoothly. In summary, this dedicated help also boosts results ahead of the national assessment but also imparts self-control and a enthusiasm for mathematics extending into secondary education plus more.. In secondary 3 math syllabus Singapore, you'll encounter these in the 'Equations and Inequalities' chapter.

Choosing the Right Method: Graphical, Substitution, or Elimination?

Each method has its strengths, and understanding when to use each is key:

  • Graphical Method: Visualize solutions by plotting graphs. But remember, it's not precise for exact solutions!
  • Substitution Method: Solve one equation for a variable, then substitute into the other. It's like solving a puzzle step-by-step!
  • Elimination Method: Make coefficients of one variable the same in both equations. Then, add or subtract to eliminate that variable. It's like magic, watching the variable disappear!

Interesting Fact: In the late 19th century, French mathematician Pierre-Simon Laplace used graphical methods to solve simultaneous equations, contributing to the field of celestial mechanics!

Pitfalls to Avoid

Blunders can happen, so watch out for these common mistakes:

  • Not checking if solutions are extraneous (hint: substitute back into original equations!)
  • Miscalculating or misreading graphs
  • Mixing up equations or variables

Remember, Singapore, we're in this together. Let's make math learning a fun adventure!

Check our other pages :

Frequently Asked Questions


There are several methods, including substitution, elimination, and matrix method. The best method depends on the specific equations.
In the substitution method, you solve one equation for one variable and substitute it into the other equation.
In the elimination method, you manipulate the equations to get one variable in terms of the other, then solve for that variable.
In the matrix method, you write the equations in matrix form and use matrix operations to solve for the variables.
Linear simultaneous equations have only first-degree terms, while non-linear equations have higher-degree terms or non-polynomial expressions.
Substitute the solutions back into both original equations. If both equations are satisfied, the solutions are correct.
Determinants are used in the matrix method to check if the system of equations has a unique solution, and to find the solutions themselves.