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Gunakan sistem eliminasi dan campuran.
3x + y = - 14 [ × 2 ]
2x - 2y = - 4 [ × 1 ]
6x + 2y = - 28
2x - 2y = - 4
-------------------- +
8x = - 32
x = - 4
Gunakan sistem substitusi untuk menemukan nilai variabel y.
2x - 2y = - 4
2(- 4 ) - 2y = - 4
- 8 - 2y = - 4
- 2y = - 4 + 8
- 2y = 4
y = - 2
Maka ;
4x = 4( - 4 ) = - 16
5y = 5( - 2 ) = - 10