Anurak has nickels, dimes, and pennies in his pocket. The coins in Anurak's pocket have a total value of 75 cents. He has three more nickels than dimes and five times as many pennies as dimes. How many coins of each type does Anurak have?
This is just simple algebra: Let n,d,and p be the number of nickels, dimes and pennies Anurak has, respectively. Then the cost will be:
And number of coins:
So, solving we get 3 dimes, 6 nickels, and 15 pennies!