Solve: x+y=1x + y = 1x+y=1 and 2x+y=32x + y = 32x+y=3.
(2,−1)(2, -1)(2,−1)
(1,0)(1, 0)(1,0)
(0,1)(0, 1)(0,1)
(2,1)(2, 1)(2,1)