Question 251264
n = number of nickels
5n = value of the nickels
d = number of dimes
10d = value of dimes
q = number of quarters
25q = value of quarters
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5n + 10d + 25q = 2600 cents
Note that it is important to work with cents to keep the units of measurement straight.
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n=d  (given)
q=2n (given)
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Substituting to get the value equation defined in terms of 'n'
5n + 10n + 25(2n) = 2600
65n = 2600
n = 40
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So, we have an answer:
n = 40
d = 40
q = 80
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What is their value?
5n = 5(40) = 200 = $2.00
10d = 10(40) = 400 = $4.00
25q = 2000 = $20.00
TOTAL = $26.00
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Done