# How do you solve by substitution #x + y = 15# and #4x + 3y = 38#?

##### 2 Answers

Jun 6, 2015

Subtract

Substitute this expression into the second equation:

Subtract

Then

Jun 6, 2015

Separate one variable in one equation and substitute it on the other one and find the solution.

Let's separate the variable that results easier in the easiest equation. We're doing this with the

And substitute it on the second one:

And now, with the