Posted by **Maura** on Monday, November 21, 2011 at 4:32pm.

O.k. I'm 42 trying to help my nephew with algebra and lets just say it's been awhile....

Total money $ 101.25

45 more dimes than nickels

3 times as many quarters as dimes.

How many nickels, dimes & quarters?

- algebra -
**Damon**, Monday, November 21, 2011 at 5:02pm
d times

n nickels

q quarters

d = (n + 45)

q = 3 d so q = 3(n+45)

5 n + 10 d + 25 q = 10125

n + 2 d + 5 q = 2025

so

n + 2 (n+45) + 15 (n+45) = 2025

n + 17(n+45) = 2025

18 n + 765 = 2025

18 n - 1260

n = 70 nickels

you can get the rest now

- algebra -
**Maura**, Monday, November 21, 2011 at 5:24pm
Got it. Man that felt good to actually solve a problem after all these years.

- algebra -
**Damon**, Monday, November 21, 2011 at 6:46pm
Hey, at least you are not 74 and trying to help :)

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