SOLUTION: How do you solve 4r/5 - 7 = r/10

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Question 778260: How do you solve
4r/5 - 7 = r/10
Answer by sofiyac(983) About Me  (Show Source):
You can put this solution on YOUR website!
common denominator is 10 so multiply everything by 10 to get rid of fractions
8r-70=r subtract 8r from each side
-70=-7r divide each side by -7
10=r