8x-2y=-5
-2x+y=4 → y = 2x + 4
And substituting for y in the first, we have
8x - 2 (2x + 4) = -5 simplify
8x - 4x - 8 = -5 add 8 to both sides and combine like terms on the left
4x = 3 divide by 4 on both sides
x = 3/4
And y = 2(3/4) + 4 = 6/4 + 4 = 22/4 = 11/2
