Use Gauss's Method to solve each system or conclude 'many solutions' or 'no
solutions'.
(a) 2x + 2y = 5
x - 4y = 0
(b) -x + y = 1
x + y = 2
(c) x - 3y + z = 1
x + y + 2z = 14
(d) -x - y = 1
-3x - 3y = 2
(e) 4y + z = 20
2x - 2y + z = 0
x + z = 5
x + y - z = 10
(f) 2x + z + w = 5
y - w = -1
3x - z - w = 0
4x + y + 2z + w = 9