SOLUTION: Solve by the elimination method. 2r-7s=-38 7r+2s=79

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Question 346135: Solve by the elimination method.
2r-7s=-38
7r+2s=79
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.2r-7s=-38
2.7r%2B2s=79
Multiply eq. 1 by 7 and eq. 2 by (-2) and add them together.
14r-49s-14r-4s=-266-158
-53s=-424
highlight%28s=8%29
Then from eq. 1,
2r-56=-38
2r=18
highlight%28r=9%29