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2x - y - z = 3 (2)
2x + 3y + 2z = - 2 (3)
(1) dan (2) :
3x + y - 3z = 8
2x - y - z = 3
___________ +
5x - 4z = 11 (4)
(2) dan (3)
6x - 3y - 3z = 9
2x + 3y + 2z = - 2
______________ +
8x - z = 7 (5)
(4) dan (5)
5x - 4z = 11
32x - 4z = 28
__________ -
28x = 17
x = 17/28
y = (34 + 60 - 84)/28 = 10/28
z = (136 - 196)/28 = - 60/28