SOLUTION: Hello, I need help solving this problem, thanks. Solve by elimination method. 2r-7s=11 7r+2s=65

Algebra ->  Systems-of-equations -> SOLUTION: Hello, I need help solving this problem, thanks. Solve by elimination method. 2r-7s=11 7r+2s=65       Log On


   

Question 387500: Hello,
I need help solving this problem, thanks.
Solve by elimination method.
2r-7s=11
7r+2s=65
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
2r-7s=11
7r+2s=65
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Multiply thru 1st by 7
Multiply thru 2nd by 2
----
14r - 49s = 77
14r + 4s = 130
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Subtract 1st from 2nd and solve for "s":
53s = 53
s = 1
----
Substitute and solve for "r":
2r -7*1 = 11
2r = 4
r = 2
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Cheers,
Stan H.