The substitution method is a technique for solving a system of equations. This article reviews the technique with multiple examples and some practice problems for you to try on your own.

Notice that neither of these equations are already solved for x or y . As a result, the first step is to solve for x or y first. Here's how it goes:

Learn to solve the system of equations -3x - 4y = -2 and y = 2x - 5 using substitution. Created by Sal Khan.

And in this video, I'm going to show you one algebraic technique for solving systems of equations, where you don't have to graph the two lines and try to figure out exactly where they intersect.

To solve a system of equations using substitution... 1. Isolate one of the variables in one of the equations, e.g. rewrite 2x+y=3 as y=3-2x. 2. You can now express the isolated variable using the …

When solving a system of equations using substitution, you can isolate one variable and substitute it with an expression from another equation. This will allow you to solve for one variable, which you can …

When do I use substitution, and when do I use elimination? It's up to you! All systems of linear equations can be solved with either substitution or elimination. On test day, you should use whichever method …

Solve systems of equations where one of the equations is solved for one of the variables.

Sal demonstrates how to solve a system of three linear equations in three variables using substitution. Created by Sal Khan.

Only some combinations of the number of coins and the total money will produce whole number solutions, and so not all combinations are possible. In fact, this is one way of checking if a …