Solve: x+y=7x + y = 7x+y=7 and 3x−y=53x - y = 53x−y=5.
(3,4)(3, 4)(3,4)
(4,3)(4, 3)(4,3)
(2,5)(2, 5)(2,5)
(5,2)(5, 2)(5,2)