Question

what is y in equation 2×2-y=8

Answer 1

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

Answer 2

$2 \times 2- y = 8 \\ 4 - y = 8 \\ - y = 8 - 4 = 4 \\ y = - 4$