SOLUTION: Solve by the elimination method. 2r-9s=-70 9r+2s=25

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Question 435713: Solve by the elimination method.
2r-9s=-70
9r+2s=25

Answer by jorel1380(3719)   (Show Source): You can put this solution on YOUR website!
2r-9s=-70
9r+2s=25
-------------
_4r-18s=-140
81r+18s=+225
85r=85
r=1
s=8.

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