3. After a PTA Fun Night at school, the Water Fountain game had many coins at the
bottom. When the coins were counted, it was found that the number of dimes was
half the number of quarters, the number of nickels was 7 more than three times the
number of quarters, and there were 34 pennies. If the total in the foutain was $18.69.
how many of each coin were in the fountain