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Mathematics 7 Online
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?

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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