Question 356263
Hi,
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Let n be the number of nickels.  then n/3 is the number of quarters and (n+1) the number of dimes.
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5n + 10(n + 1) + 25n/3 = 500 cents
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15n + 30(n + 1) + 25n = 1500 cents
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70n = 1470
n = 21
dimes = 22
quarters = 7
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ccheck your answer
21 + 22 + 7 = 50 coins