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Paul has a mix of quarters and dimes in his piggybank. He has twice as many dimes than he has quarters. He counts all his coins and notices that he has 9.00$ in total. How many quarters does Paul have?

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francocanacari

Paul has 40 dimes and 20 quarters in his piggybank.

Given that Paul has a mix of quarters and dimes in his piggybank, and he has twice as many dimes than he has quarters, and he counts all his coins and notices that he has 9.00$ in total, to determine how many quarters does Paul have, the following calculation has to be done:

  • D + Q = 9
  • D = 2Q
  • 20 x 0.1 + 10 x 0.25 = 2 + 2.5 = 4.5
  • 40 x 0.1 + 20 x 0.25 = 4 + 5 = 9

Therefore, Paul has 40 dimes and 20 quarters in his piggybank.

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