Question

X-2y+3z =5
2x+3y-5z =-16
3x-5y+3z =-2
Tolong kerjakan dengan cara substitusi semua ya :)

Answer 1

X-2y+3z=5
3x-5y+3z=-2
__________ -
-2x+3y=7 (1)

x-2y+3z=5
2x+3y-5z=-16
___________ X5/3
5x-10y+15z=25
6x+9y-15z=-48
____________+
11x-y=-23

-2x+3y=7
11x-y=-23
_________X1/3
-2x+3y=7
33x-3y=-69
__________+
31x=-62
x=-1

-2(-1)+3y=7
2+3y=7
3y=6
y=2

x-2y+3z=5
-1-2(2)+3z=5
-5+3z=5
3z=10
z=10/3