Math
posted by Sandra .
Marsha has nickels, dimes, and quarters. She has 207 coins total. Marcy has 13 less quarters than nickels. Find the number of each coin if she has a total of $28.

nickels  x
quarters  x13
dimes  207  (x + x13) = 220  2x
solve for x:
5x + 25(x13) + 10(2202x) = 2800
5x + 25x  325 + 2200  20x = 2800
10x = 925
but x should be a whole number,
Unless I made a silly arithmetic error, your data is not consistent. 
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