Solve: x−y=1,2x+y=11x - y = 1, 2x + y = 11x−y=1,2x+y=11.
(4,3)(4, 3)(4,3)
(3,4)(3, 4)(3,4)
(5,4)(5, 4)(5,4)
(6,5)(6, 5)(6,5)