Question 50238
A box currently contains 44 coins, consisting of pennies and dimes and quarters. the number of pennies is equal to the number of dimes, and the total value is $4.37. How may of each denominatin of coin does the box contain? 
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Let the number of pennies be "x".
The value of those pennies is x cents.
the number of dimes is also "x".
The value of those dimes is 10x cents
The number of quarters is "44-x-x"=44-2x
The value of those quarters is 25(44-2x)=1100-50x cents
EQUATION:
value + value + value = 437 cents
x + 10x + 1100-50x = 437
-39x = - 663
x=17 ( number of pennies and number of dimes)
44-2y=44=34=10  (  number of quarters)
Cheers,
Stan H.