SOLUTION: solve using the substitution method r-7s=0 and 9r-2s=61

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Question 831286: solve using the substitution method r-7s=0 and 9r-2s=61
Answer by Alan3354(69443) About Me  (Show Source):
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solve using the substitution method r-7s=0 and 9r-2s=61
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r-7s=0 --> r = 7s Sub for r in the other equation.
9r-2s=61