Question
Sam saved some fifty-cent coins and ten-cent coins in his coin box. The number of fifty-cent coins he saved is four times the number of ten-cent coins. If he had 7 ten-cent coins. how much was his savings in the coin box? (Give the answer in dollars.)
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Sam saved some fifty-cent coins and ten-cent coins in his coin box. The number of fifty-cent coins he saved is four times the number of ten-cent coins. If he had 7 ten-cent coins. how much was his savings in the coin box? (Give the answer in dollars.)