Question

A jar contains only​ pennies, nickels,​ dimes, and quarters. There are 29 ​pennies, 13 dimes, and 12 quarters. The rest of the coins are nickels. There are 78 coins in all. How many of the coins are not​ nickels? If n represents the number of nickels in the​ jar, what equation could you use to find​ n?

Answer 1

24 of the coins are nickels. 29+13+12= 54, 54+24=78