3x - 2y + z = 11 2x + 3y - 2z = 1 x - 3y + z = 4 cara pengerjaan nya terserah menggunakan metode subtitusi eliminasi atau gabungan

3x - 2y + z= 11 |×2
2x + 3y -2z= 1 |×3
____________
6x - 4y + 2z = 22
6x + 9y - 6z = 3
___________(-)
-13y+8z=19

2x + 3y -2z= 1 |×1
x - 3y + z = 4 |×2
___________
2x + 3y -2z= 1
2x - 6y + 2z = 8
___________(-)
9y - 4z = -7

-13y+8z=19 |×1
9y - 4z=-7 |×2
___________
-13y+8z=19
18y -8z=-14
__________(+)
5y=5
y=1

-13y+8z=19
-13(1)+8z=19
8z=19+13
8z=32
z=4

3x - 2y + z= 11
3x- 2(1) + (4)=11
3x=11+2-4
3x=9
x= 3