Question

Solve the system by the elimination method.

2x + y - 4 = 0
2x - y - 4 = 0
When you eliminate y, what is the resulting equation?

A.x = 0
B.4x = -8
C.4x = 8

Answer 1

Answer: C is correct, 4x=8

Explanation:

You will add the two equations...

4x-8=0

Now you need to move the -8 over, which reverses its sign to positive.

4x=8