Solve: x−y=4,x+2y=7x - y = 4, x + 2y = 7x−y=4,x+2y=7.
(5,1)(5, 1)(5,1)
(4,0)(4, 0)(4,0)
(6,2)(6, 2)(6,2)
(1,5)(1, 5)(1,5)