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Jun Wei has 12 more 10-cent coins than 20-cent coins. The total value of all his coins is $5.40. Find the total number of coins he has.

 Mar 7, 2020
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Jun Wei has 12 more 10-cent coins than 20-cent coins. The total value of all his coins is $5.40. Find the total number of coins he has.

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 Mar 7, 2020

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