Solve the system: x+y=3x + y = 3x+y=3 and 2x+y=42x + y = 42x+y=4.
(1,2)(1, 2)(1,2)
(2,1)(2, 1)(2,1)
(0,3)(0, 3)(0,3)
(3,0)(3, 0)(3,0)