8. Which system of equations has the same solutions as the system below?
3x + 3y = 24
3x - y = 4
(3)
-)
3x + 3y = 24
9x - 3y = 4
(2)
3x + 3y = 24
9x - 3y = 12
x+y=16
3x - y = 4
(4)
12x + 12y = 288
6x - 2y = -8