Question

What is the value of y in the following system of equation3x-4y=-20 -x+2y=10

Answer 1

It’s either 15, -15 or -7.5

3x-4y==20-x+2y=10

2x-2y=-20=10

2x-2y=30

30/2x= 15

15/-2y= -7.5

If you divided 30 by 2y it would be -15 but go with the answer that is one of the answer choices.