Solve: x−y=1x - y = 1x−y=1 and y=2x−4y = 2x - 4y=2x−4.
(3,2)(3, 2)(3,2)
(2,3)(2, 3)(2,3)
(4,3)(4, 3)(4,3)
(1,0)(1, 0)(1,0)