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December 8, 2016
Posted by **Lisa** on Sunday, January 30, 2011 at 6:25pm.

7r-2s=61

2r+7s=25

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**PsyDAG**, Monday, January 31, 2011 at 11:02amMultiply top equation by 7 and bottom one by 2, then add the two equations to find r. Substitute the value of r in one equation to find s. To check, put both values in the other equation.