# How do you solve #-x + y = 12# and #x + 2y = 3#?

##### 2 Answers

#### Answer:

#### Explanation:

All you really ahve to do to solve this system of equations is add the left side and the right side of the equations *separately* to eliminate the variable

To get the value of

Now use this value of

Add

#### Answer:

I found:

#### Explanation:

You can add the two equations (in column):

so

substitute this value into the first equatiom: