Question

2 (x- y) = 8 where x = 6

Answer 1

Plug the value of x in the equation

2(6 - y) = 8
12 - 2y = 8
-2y = -4
y = 2

Answer 2

2(x-y)=8
2(6-y)=8
12-2y=8
-12     -12
-2y=-4
/-2   /-2
y=2