Subtract the second equation from the first equation :
The xs and zs would cancel. On the left side, y–(-y)=2y. On the right side, 6–8=-2
We're left with 2y=-2
Divide both sides by 2:
Y=-1
Subtract the third equation from the second equation. The xs would cancel again. -y–y=-2y and z–(-z)=2z. So on the left side we have -2y+2z and on the right side, 8-0=8.
We get -2y+2z=8.
Plug in -1 for y:
-2(-1)+2z=8
2+2z=8
Subtract 2 from both sides:
2z=6
Divide both sides by 2:
Z=3
Plug in -1 for y and 3 for z into the first equation:
X+(-1)+3=6
Solve for x:
X+2=6
Subtract 2 from both sides:
X=4
Hope this helps! :)
