x=2y-4z+8
Substitusi
2(2y-4z+8)-y-z=4
4y-8z+16-y-z=4
3y-9z=-12
.
3(2y-4z+8)+y+z=6
6y-12z+24+y+z=6
7y-11z=-18
21y-63z=-84
21y-33z=-54
eliminasi y
-30z=-30
z=1
3y-9(1)=-12
3y-9=-12
3y=-3
y=-1
..
3x+y+z=6
3x-1+1=6
3x=6
x=2
Semoga bermanfaat
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Jawaban:
x=2y-4z+8
Substitusi
2(2y-4z+8)-y-z=4
4y-8z+16-y-z=4
3y-9z=-12
.
3(2y-4z+8)+y+z=6
6y-12z+24+y+z=6
7y-11z=-18
.
21y-63z=-84
21y-33z=-54
eliminasi y
-30z=-30
z=1
.
3y-9z=-12
3y-9(1)=-12
3y-9=-12
3y=-3
y=-1
..
3x+y+z=6
3x-1+1=6
3x=6
x=2
Semoga bermanfaat