SOLUTION: There is a collection of 60 coins made up of nickels and dimes. If the total was $5, how many nickels?

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Question 1022677: There is a collection of 60 coins made up of nickels and dimes. If the total was $5, how many nickels?
Answer by CubeyThePenguin(3113) About Me  (Show Source):
You can put this solution on YOUR website!
n = number of nickels
d = number of dimes

n + d = 60
5n + 10d = 500

Multiply the first equation by 5.

5n + 5d = 300
5n + 10d = 500

Subtract to get -5d = -200, or d = 40.

There are 40 dimes, so there are 20 nickels.