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OpenStudy (anonymous):
a collection of quarters and dimes is worth more than 20 dollars. There are twice as many quarters as dimes. At least how many dimes are there?
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OpenStudy (mertsj):
d= number of dimes 2d= number of quarters .10d = value of dimes .25(2d)= .50d = value of quarters .10d+.50d >20 .6d>20 d>33
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