<PRE><B>Question 241479</B>
Is it possible to spend $30 for 100 stamps consisting of 20-cent stamps and 33-cent stamps?
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Equations:
Quantity:   t + r = 100
Value:::  20t+33r = 3000
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Multiply thru the Quatity Eq. by 20 to get:
20t + 20r = 2000
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Subtract that from the Value Eq. to get:
13r = 1000
r = 76.92
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Since r is the number of thirty cent stamps and is not
an integer the combination does not work.
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Cheers,
Stan H.</PRE>