Answer :

4x +8y=64

subtract 8y on both sides
4x=-8y +64

divide by 4 both sides with all #
x=-2y+16
The given equation is --> 4x + 8y = 64
==> 4x = 64 - 8y
==> x = 64/4 - 8y/4
==> x = 16 - 2y

So, the final answer is --> x = 16-2y