CPM Homework Help : CAAC Problem 6-27

Nina has some nickels and 9 pennies in her pocket. Her friend, Maurice, has twice as many nickels as Nina. Together, these coins are worth 84¢. How many nickels does Nina have? Solve using any method, but show all of your work. Homework Help ✎

Step 1:

Let n represent the number of nickles

Step 2:

5n + 9 = Nina's money (nickles are worth 5 cents so multiply n by 5).
2(5n) = Maurice's money.

Step 3:

Set up an equation. Nina's money + Maurice's money = 84 cents. So, 5n + 9 + 10n = 84

Answer:

Nina has five nickels.