How do you solve systems of equations using the substitution method?

1 Answer
Jun 15, 2018

Please see below.

Explanation:

I assume you are interested in linear equations. In general you need n equations if you have n variables.

Let us have 3 equations and 3 variables x,y and z. Now pick up an equation with x and segregate it say x in terms of y,z. When we put this value of x in two other equations we get two equations in y and z.

We can now find y in terms of z say using second equation and when we put in third equation we get value of z.

Once z is known, it is easy to find y and then x.