please help me solve this three variable equation
x +3y - 6z =7
2x - y + z =1
x +2y +2z = -1

Question

please help me solve this three variable equation
  x +3y - 6z =7
2x -   y + z  =1
  x +2y  +2z = -1

barrycarter · Answer

Hint: you can rewrite the first equation as "x = 7-3y+6z". Now plug that value in for x in the second equation. Repeat for y.

anonymous · Answer

1.  Use the 1st equation to eliminate x from the 2nd equation.

2.  Use the 1st equation to eliminate x from the 3rd equation.

3.  Use the 2nd equation to eliminate y from the 3rd equation.

4.  Solve the 3rd equation for z.

5.  Substitute the value of z in the 2nd equation to find y.

6. Substitute the values of y and z in the 1st equation to solve 
   for x.

rainbow_rocks03 · Answer

PLZ HELP ME!