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Dave bowers collects u.s gold coins. He has a collection of 47 coins. Some are $10 coins, and the rest are $20 coins. If the face value of the coins is $670, how many of each de…

Dave bowers collects u.s gold coins. He has a collection of 47 coins. Some are $10 coins, and the rest are $20 coins. If the face value of the coins is $670, how many of each de…
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Dave bowers collects u.s gold coins. He has a collection of 47 coins. Some are $10 coins, and the rest are $20 coins. If the face value of the coins is $670, how many of each denomination does he have?

asked
User Mike Bockus
by
8.8k points

1 Answer

12 votes

670=10(a)+20(b)

47=a+b

a is amount of $10 coins=27

b is amount of $20 coins=20

answered
User Jared Joke
by
8.9k points
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