Question

solve for x and y:2x+y=6 and 2x-y=2

Answer 1

$2x + y - 6 + 2x - y - 2 = 0 \\ 4x - 8 \\ 4x = 8 \\ x = 2 \\ 2 \times 2 + y - 6= 0 \\ 4 - y - 6 = 0 \\ - y = - 2 \\ y = 2 \\ (x.y) = (2.2)$