# Do you need to add or subtract the equations #5x+7y=-31# and #5x-9y=17# to solve the system?

##### 1 Answer

#### Answer:

See answer below

#### Explanation:

Given:

Since both equations have a

Substitute this value for

Add

**Check your answer** by substituting both

**Solution:** is a point (-2, -3)

which is the intersection point common to both lines