Solve: x=y+1,x+y=5x = y + 1, x + y = 5x=y+1,x+y=5.
(3,2)(3, 2)(3,2)
(2,3)(2, 3)(2,3)
(4,1)(4, 1)(4,1)
(1,4)(1, 4)(1,4)