Solve: x−y+z=2,2x+y−z=4,x+2y−2z=2x - y + z = 2, 2x + y - z = 4, x + 2y - 2z = 2x−y+z=2,2x+y−z=4,x+2y−2z=2.
Infinitely many solutions
(2,0,0)(2, 0, 0)(2,0,0) only
No solution
(1,1,2)(1, 1, 2)(1,1,2)