# How do you solve the system #x=2y+7# and #x=y+4# using substitution?

##### 1 Answer

Mar 18, 2017

#### Explanation:

We know

Move the

Subtract 7 on both sides:

Personally, I like the y on the other side. You are allowed to flip the equation around:

Now plug this in to one of the equations. I will plug it into the second equation:

Check by plugging in to the other equation:

It works out!