Dengan cara eliminasi, substitusi, gabungan, dan determinan.

dg cara eliminasi
- x + y + z = - 4
x + 2y + z = 0
----------------------(-)
- 2x - y = - 4 .. pers 1

x + 2y + z = 0
2x + 3y + z = 1
---------------------(-)
- x - y = - 1 .... pers 2

pers 1 & 2
- 2x - y = - 4
- x - y = - 1
------------------(-)
- x = - 3
x = 3

- 2x - y = - 4
- x - y = - 1 |×2
- 2x - y = - 4
- 2x - 2y = - 2
---------------------(-)
y = - 2

- x + y + z = - 4
- 3 - 2 + z = - 4
- 5 + z = - 4
z = - 4 + 5
z = 1

hp = { 3, - 2 , 1} (B)