Hey, I understand the concept for this, but for some reason I can't seem to get the answers right. I don't know what I'm doing wrong. This is one of the problems I did and my work.

4x + 8y = 20

-4x + 2y = -30

4x + 8y/8 = 20/8

4x/4x + y = 2.5/4x

y = 2.5/4x

4x + 8(2.5/4x) = 20

4x/4 + 4.75 = 20/4

x + 4.75 -4.75 = 5 - 4.75

x = 0.25

4(.25) + 8y = 20

1 + 8y/8 = 20/8

1 -1 + y = 2.2 - 1

y = 1.2

CHECK:

4x + 8y = 20

4(.25) + 8(1.2) = 20

1 + 9.6 =/= 20

10.6 =/= 20

Thanks in advance!