Dave Bowers collects U.S. gold coins. He has a collection of 49 coins. Some are $10 coins, and the rest are $20 coins. If the face value of the coins is $690

Question

... how many of each denomination does he​ have?How many $10 coins does he have?How many $20 coins does he have?

Raymond B. · Accepted Answer

x+y=4910x + 20y = 69010x  +10y  = 490         10y = 200            y = 20 coins that are $20 coins           x = 29 coins that are $10 coins10(29) + 20(20) = 290+ 400 = 690

Dave Bowers collects U.S. gold coins. He has a collection of 49 coins. Some are $10 coins, and the rest are $20 coins. If the face value of the coins is $690< ...

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Dave Bowers collects U.S. gold coins. He has a collection of 49 coins. Some are​ $10 coins, and the rest are​ $20 coins. If the face value of the coins is ​$690​< ...