P5 fractions (fr: hanyin)

A box contains 20-cent coins n 50-cent coins.1/4 of the number of 20-cent coins is equal to 3/5 of the number of 50-cents coins.there is a total of 102 coins in the box.find the total value me all the coins in the box.
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My solution

http://www.showme.com/sh/?h=MsH2Crw
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