SOLUTION: Ann has $3.25 worth of change in nickels and dimes. If she has 3 times as many nickels as dimes, how many of each type of coin does she have?

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Question 1084410: Ann has $3.25 worth of change in nickels and dimes. If she has 3
times as many nickels as dimes, how many of each type of coin does she have?
Found 2 solutions by josgarithmetic, addingup:
Answer by josgarithmetic(39623) About Me  (Show Source):
You can put this solution on YOUR website!
n nickels
d dimes


5n%2B10d=325
n%2B2d=65

n%2Fd=3
n=3d


3d%2B2d=65
5d=65
highlight%28d=13%29
-
highlight%28n=39%29



CHECK:
13%2A0.1%2B39%2A0.05
1.3%2B1.95
3.25
solution works.

Answer by addingup(3677) About Me  (Show Source):
You can put this solution on YOUR website!
n = 3d
0.05n+0.10d = 3.25
0.05(3d)+0.10d = 3.25
0.15d+0.10d = 3.25
0.25d = 3.25
d = 3.25/0.25 = 13
So she has 13 dimes. And n = 3d = 3(13) = 39
------------------------------------
Check:
0.10*13 = 1.30
0.05*39 = 1.95
. . . . ______
Total . . 3.25 Correct