SOLUTION: I have 60 cents all in nickels and dimes, I have twice as many nickels as dimes. How many dimes do i have?

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Question 993294: I have 60 cents all in nickels and dimes, I have twice as many nickels as dimes. How many dimes do i have?
Answer by CubeyThePenguin(3113) About Me  (Show Source):
You can put this solution on YOUR website!
n = number of nickels
d = number of dimes

5n + 10d = 60
n = 2d

Substitute.

5(2d) + 10d = 60
20d = 60
d = 3

You have 3 dimes and 6 nickels.