A jar contains only pennies, nickels, dimes, and quarters. There are 16 pennies, 18 dimes, and 28 quarters. The rest of the
coins are nickels. There are 84 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?
The parentheses are how many of the coins are not nickels. and if you add it then subtract it from the total amount you will get how many nickels were in the jar.
