# How do you solve #4x+3y=-5# and #x-y=-3# using substitution?

##### 1 Answer

Jul 11, 2016

#### Explanation:

In this answer, I have subbed in for x. A solution that subbed in for y would be equally valid (and might be instructive for you to do to check you get the same answer!).

Rearrange the second equation to obtain:

Sub this into the first expression: