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Question 817550: a/7+a/3=10
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! a/7 + a/3 = 10
a(3/21) + a(7/21) = 10
a(10/21) = 10
a = 10(21/10)
a = 21
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