Find the intersection of three planes x + 3Y + Z = 1, 2x-y-z = 0, - x + 2Y + 2Z = 0

Find the intersection of three planes x + 3Y + Z = 1, 2x-y-z = 0, - x + 2Y + 2Z = 0

The intersection is (0,1 / 2, - 1 / 2)