SOLUTION: Use the ELIMINATION METHOD to slove the problem. 2x-2y+z=-15 6x-3y-z=-19 3x-y-z=-6

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Question 636578: Use the ELIMINATION METHOD to slove the problem.
2x-2y+z=-15
6x-3y-z=-19
3x-y-z=-6
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

6x-3y-z= -19                  z+=+6x-3y+%2B+19

2x-2y+z= -15

 8x-5y = -34



3x-y-z= -6

2x-2y+z= -15

 5x - 3y = -21     y+=%285%2F3%29x+%2B+7



 8x-5y = -34

 5x - 3y = -21     ||Multiply 1st by 3, 2nd by 5 and subtracting 1st from 2nd to eliminate y

    x = -3  and y = 2   and  z = -5