Question
Penelope had 20-cent and 10-cent coins in the ratio of 4 : 5. The total value of the coins was $13. How many 10-cent coins did Penelope have?
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Penelope had 20-cent and 10-cent coins in the ratio of 4 : 5. The total value of the coins was $13. How many 10-cent coins did Penelope have?