Question 920653: paul has a collection of nickels and dimes that has a total value of $12.50. He has 150 coins in all. How many dimes does Paul have? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! paul has a collection of nickels and dimes that has a total value of $12.50. He has 150 coins in all. How many dimes does Paul have?
-----------------
Value Eq::: 5n + 10d = 1250 cents
Quantity::: n + d = 150
-------
Modify::
n + 2d = 250
n + d = 150
-------
Subtract and solve for "d"::
d = 100 (# of dimes)
------
n = 150-d = 50 (# of nickels)
------------------------------
Cheers,
Stan H.
-------------
(