Eight U.S. coins are worth a total of 38 cents. How many of the coins are dimes?
You would take off 3 pennies and the remaining 5 coins would have to be: 3 nickels + 2 dimes. So:
2 dimes = 20 cents
3 nickels = 15 cents
3 pennies = 3 cents.
Or, 8 coins = 38 cents.