Solve: x+y=8,3x−y=4x + y = 8, 3x - y = 4x+y=8,3x−y=4.
(3,5)(3, 5)(3,5)
(4,4)(4, 4)(4,4)
(2,6)(2, 6)(2,6)
(5,3)(5, 3)(5,3)