tolong bantu cara nya dong

x+2y+z=0
-x+y+z=-4
2x+3y+z=1

x+2y+z=0
-x+y+z=-4
---------------- -
2x+y=4. --> y=4-2x

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

x+2y+z=0
x+2(4-2x)+(-3-2y)=0
x+8-4x-3-2y=0
-3x-2y=-5

2x+y=4. dikali 2. 4x+2y=8
-3x-2y=-5. dikali 1. -3x-2y=-5
------------------ +
x=3
y=4-2x=4-2(3)=-2

z=-3-2y=-3-2(-2)=1

jadi (3,-2,1)