2x + y / 3 = -4 ; x /2 - y / 8 = 1 / 4
x = 5 ; y = 4
x= 9 ; y = 3
x - 4y = 16 ; 3x + 2y = -8
x = 18 ; y = 14
x + y =12 ; x - y = 6
x = 3 ; y = 1
x= 0 ; y = -4
x = -1 ; y = -6
4x +y = 24 ; 5x + 3y = 37
2x + 3y = 9 ; 3x - 6y = 3
x - y = 4 ; x + y = 32
