# How do you solve the system of equations #y+2x=3# and #-y+4=-x#?

##### 1 Answer

Dec 2, 2016

#### Answer:

#### Explanation:

In the first equation, we can determine a value for

Subtract

In the second equation, substitute

Open the brackets and simplify. The product of two negatives is a positive, and that of a negative and positive is a negative.

Add

Subtract

Divide both sides by

In the first equation, substitute

Open the brackets and simplify.

Add