<PRE><B>Question 776869</B>
The problem is you have a spare change jar with 56 coins. They consist of nickels, dimes, and quarters. There are as many quarters as dimes and nickels. How many nickels are there.
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Quantity Eq:: n + d + q = 56
Quantity Eq:: q = d + n
Value Eq ????
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You need one more equation to solve for 3 variables.
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Cheers,
Stan H. 
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