Three dollar bills were exchanged for a certain number of nickels and the same number of dimes.

How many nickels were there?
You must show your algebra.

Solution to the Problem:

There were 20 nickels.

Let x = number of dimes = number of nickels.
5x + 10x = 300
x = 20.


Correctly solved by:

1. Ivy Joseph Pune, Maharashtra, India
2. Garima Mandwani Pune, Maharashtra, India
3. Rob Miles Northbrook, Illinois
4. James Alarie Flint, Michigan
5. Don Norris Watkinsville, Georgia
6. Mishan Kasiparsad Johannesburg, South Africa