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votecity20:
Peter has six times as many dimes as quarters in her piggy bank. She has 21 coins in her piggy bank totaling $2.55. How many of each type of coin does she have?
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Vocaloid:
Let’s let q = # of quarters, d = # of dimes “Six times as many dimes as quarters” so d = 6q 21 coins total means q + d = 21 The coins are worth 2.55 total, so 0.25q + 0.10d = 2.55 Solve the system for q and d
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