Question

solve the system of equations.
x-y+z=8 x+y+z=6 x+y-z=-12

Answer 1

i dont understand. i am trying to see what u mean.

Answer 2

x-y+z=8
x+y+z=6
x+y-z=-12
Add first and last
2 x = -4
x=-2

Answer 3

x-y+z=8
x+y+z=6
x+y-z=-12
and second and third
2x + 2 y=-6
2(-2) + 2 y = -6
2 y=-2
y=-1
Find z