Solve by back substitution. x = -2, x + y + z = -1, 2x + 2z = 0 Thank you

Solve by back substitution. x = -2 x + y + z = -1 2x + 2z = 0 Thank you

Your Answer:

1---> x = -2
2---> x + y + z = -1
3---> 2x + 2z = 0

3---> 2(-2)+2z=0
2z=4
z=2

2---> (-2)+y+(2)=-1
y=-1

solution: (-2,-1,2)