SOLUTION: Jamil always throws loose change into a pencil holder on his desk and takes it out every two weeks. This time it is all nickels and dimes. There are twice as many dimes as nickels,

Algebra ->  Equations -> SOLUTION: Jamil always throws loose change into a pencil holder on his desk and takes it out every two weeks. This time it is all nickels and dimes. There are twice as many dimes as nickels,      Log On


   

Question 1131033: Jamil always throws loose change into a pencil holder on his desk and takes it out every two weeks. This time it is all nickels and dimes. There are twice as many dimes as nickels, and the value of the dimes is $ 0.90 more than the value of the nickels. How many nickels does Jamil have?
Found 2 solutions by ikleyn, stanbon:
Answer by ikleyn(52778) About Me  (Show Source):
You can put this solution on YOUR website!
.
Let x be the number of nickles; then the number of dimes is  2x.


The "value" equation is


    10*(2x) - 5x = 90   cents.


Simplify and solve it


    20x - 5x = 90

    15x = 90

      x = 90/15 = 6.


Answer.   6 nickels  and  2*6 = 12 dimes.

Solved.


Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Jamil always throws loose change into a pencil holder on his desk and takes it out every two weeks. This time it is all nickels and dimes. There are twice as many dimes as nickels, and the value of the dimes is $ 0.90 more than the value of the nickels. How many nickels does Jamil have?
Equations:
d = 2n
10d - 5n = 90 cents
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Substitute for "d" and solve for "n"::
10(2n) - 5n = 90
15n = 90
n = 6 (# of nickels)
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Cheers,
Stan H.
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