Question

X+y+z=6
2×+4y+2z=2
-×+8y-3z=-63

Answer 1

Answer: x=5, y=-5, z=6

Explanation:

x+y+z=6 -> 2x+2y+2z=12

subtract 2x+4y+2z=2 from this, and you get -2y=10 -> y=-5

So, x+z=11 and -x-3z=-23

x+z=11

-x-3z=23

---------

-2z=-12

z=-6

Meaning x=5.