Question 932829
In your piggy bank, you have $6.80, which is a combination of 39 coins(quarters and dimes only).
 Is it possible to have 39 coins of quarters and dimes only? 
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Equations::
Quantity of coins: d + q = 39 coins
Value of the coins 10d + 25q = 680 cents
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Modify::
10d + 10q = 10*39
10d + 25q = 680
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Subtract and solve for "q":
15q = 290
q = 19 1/3 (not a realistic number of quarters)
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Ans: It is not possible.
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Cheers,
Stan H.
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