2x +y - z =4 3x + y +z =10

Jawabannya:
2x+y-z=4 |×3|
3x+y+z=10. |×2|

6x+3y-3z=12
6x+2y+2z=20
-------------------- -
x= -8

2x+y-z=4 |×2|
3x+y+x=10|×2|

4x+2y-2z=8
6x+2y-2x=20
------------------ -
-2xyx=-12
xyz=-12/-2
xyz= 6

Semoga Membantu