Question

{3x+5y=-22
{x=y-2

me ajudem....

Answer 1

3x + 5y = -22
x = y - 2

3 . (y - 2) + 5y = -22
3y - 6 + 5y = -22
8y = - 22 + 6
8y = -16
y = -16/8
y = -2

x = -2 - 2
x = -4

S = {-4,-2}