SOLUTION: there are 48 coins consisting of nickels and dimes. if the total value of the coins is $3.90 , how many nickels are there

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Question 976816: there are 48 coins consisting of nickels and dimes. if the total value of the coins is $3.90 , how many nickels are there
Answer by FrankM(1040) About Me  (Show Source):
You can put this solution on YOUR website!
We can set this up with a single variable, N for number of Nickles. (And 48-N will be dimes)
5N+10(48-N)=390
5N+480-10N=390
-5N=-90
N=18, 48-N= 30
30 dimes are $3.00 18 nickles, $.90.