SOLUTION: A box contains seven more nickels than quarters. How many nickels are there if the total value is $2.75?

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Question 316821: A box contains seven more nickels than quarters. How many nickels are there if the total value is $2.75?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.N=Q%2B7
2.5N%2B25Q=275
Substitute eq. 1 into eq. 2,
5%28Q%2B7%29%2B25Q=275
5Q%2B35%2B25Q=275
30Q%2B35=275
30Q=240
highlight%28+Q=8%29
Then from eq. 1,
N=8%2B7
highlight%28N=15%29
There are 15 nickels.