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

Algebra ->  Equations -> SOLUTION: Solve by back substitution. x = -2 x + y + z = -1 2x + 2z = 0 Thank you      Log On


   

Question 745577: Solve by back substitution.
x = -2
x + y + z = -1
2x + 2z = 0
Thank you
Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
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)