# How should I reply to: what is a system of linear equations involving more than two variables?

Contents

A system of linear equations involving more than two variables is a set of equations where each equation is a linear combination of three or more variables.

## Detailed response to a query

A system of linear equations involving more than two variables is a mathematical concept often used in fields such as physics and engineering. It consists of a group of two or more linear equations that must be solved simultaneously. Each equation within the system involves three or more variables, and the ultimate goal is to find the unique values for each variable that satisfy all equations in the system.

According to the famous mathematician, George Dantzig, “The simplex method of linear programming solves problems by dealing with inequalities having at most a few variables and thousands of constraints. Other algorithms have been developed for dealing efficiently with linear programs having hundreds of thousands of variables and constraints.”

Interesting facts about systems of linear equations involving more than two variables include:

• The solution to a system of linear equations involves finding the point where all of the equations intersect.
• Systems of linear equations can be solved manually using methods such as substitution or elimination, or using computer software such as MATLAB or Mathematica.
• In physics, systems of linear equations involving more than two variables are often used to model complex physical systems such as circuits and mechanical systems.
• In engineering, these systems are used in a variety of applications such as structural analysis and optimization.
• Systems of linear equations can also be represented using matrices, which allows for a more concise and organized way of solving the system.
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A possible table to demonstrate a system of linear equations involving more than two variables:

Equation 1: 2x + 3y – z = 8
Equation 2: 4x – 2y + 5z = -7
Equation 3: x + 6y – 3z = 10

The solution to this system of linear equations is: x = 1, y = -2, z = -3.

Larger systems of linear equations involve more than two equations that go along with more than two variables. These larger systems can be written in the form Ax + By + Cz + . . . = K where all coefficients (and K) are constants.

Hi Carolyn,

A great question. A system of equations (“system” meaning more than one equation) with two variables looks like this:
x + y= 8
2x + 3y = 5
There are several methods to solving systems of equations, including “substitution,” “elimination,” or graphing. The easiest ways involve substitution or elimination. In the set above, notice that the first equation “x + y = 8” does not have any coefficients in front of the “x” or the “y.” When comparing this to the equation below, “2x + 3y = 5,” it is important to decide which term to eliminate, either the one containing “x” or the one containing “y.” For our purposes, let’s choose to eliminate the “x” in both equations. For this, you will need to multiply the first equation by [-2]. Why? Multiplying by [-2] will make the top term [-2x], which, when we add to the bottom term, [2x], will cause it to cancel or “zero” out. So, Let’s try it:
-2 [ x + y = 8 ] +
2x + 3y = 5
==>> Equation 1: -2x – 2y = -16
Equation 2: 2x + 3y = 5

See a related video

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In this video, we learn how to solve systems of equations with two variables using both the elimination and substitution methods. The elimination method involves adding the two equations to eliminate one of the variables, while the substitution method involves replacing one variable in one equation with an expression in terms of the other, and then solving for the remaining variable. The video provides examples of both methods and shows how to interpret the solutions as ordered pairs representing the intersection points of the two equations. We also learn about special cases where there are no solutions or infinite solutions to the system of equations.

## People are also interested

### What is a system of linear equations in two or more variables?

Answer: An equation is said to be linear equation in two variables if it is written in the form of ax + by + c=0, where a, b & c are real numbers and the coefficients of x and y, i.e a and b respectively, are not equal to zero. For example, 10x+4y = 3 and -x+5y = 2 are linear equations in two variables.

### How do you solve systems of linear equations in more than two variables?

As a response to this: SOLVE A SYSTEM OF EQUATIONS BY ELIMINATION.

1. Write both equations in standard form.
2. Make the coefficients of one variable opposites.
3. Add the equations resulting from Step 2 to eliminate one variable.
4. Solve for the remaining variable.
5. Substitute the solution from Step 4 into one of the original equations.

### How do you solve a linear system with 3 variables?

And let’s add them 2y and negative 2y cancels 4x plus x is 5x 2z plus z is 3z. So here’s the second equation that we have in terms of x and z 5x plus 3z is equal to 14..

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### How do you solve a system of equations with 4 variables?

So I’m going to use that so now I have my two equations. With only two variables. I need to combine them to eliminate a variable. So I decide the variable to eliminate it’s going to be Y.

### What is a system of linear equations?

A system of linear equations consists of two or more equations made up of two or more variables such that all equations in the system are considered simultaneously. The solution to a system of linear equations in two variables is any ordered pair that satisfies each equation independently. See Example 5.2.1.

### How do you know if two linear systems are equivalent?

The answer is: Two linear systems using the same set of variables are equivalent if each of the equations in the second system can be derived algebraically from the equations in the first system, and vice versa. Two systems are equivalent if either both are inconsistent or each equation of each of them is a linear combination of the equations of the other one.

### What is a linear equation with two variables?

Response: are both linear equations with two variables. When considered together, they form a system of linear equations. A linear equation with two variables has an infinite number of solutions (for example, consider how (0,5) (0,5), (1,4) (1,4), (2,3) (2,3), etc. are all solutions to the equation x+y=5 x +y = 5 ).

### How many types of linear equations are there?

Answer will be: There are three types of systems of linear equations in two variables, and three types of solutions. An independent system has exactly one solution pair (x, y). The point where the two lines intersect is the only solution. An inconsistent system has no solution. Notice that the two lines are parallel and will never intersect.

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