Dave Bowers collects U.S. gold coins. He has a collection of 39 coins. Some areâ $10 coins, and the rest areâ $20 coins. If the face value of the coins is

â$570

how many of each denomination does heâ have?

How manyâ $10 coins does heâ have?â

How manyâ $20 coins does heâ have?

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5 Jul 2019

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