SOLUTION: Allen bought 20 stamps at the post office in 37� and 20� denominations. If the total cost of the stamps was $7.06, how many 37� stamps did Allen buy?

Question 63483: Allen bought 20 stamps at the post office in 37� and 20� denominations. If the total cost of the stamps was $7.06, how many 37� stamps did Allen buy?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Allen bought 20 stamps at the post office in 37� and 20� denominations. If the total cost of the stamps was $7.06, how many 37� stamps did Allen buy?
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Let # of 20 cent stamps be "x" ; Value of these is 20x cents
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# of 37 cent stamps is "20-x" ; Value of these is 37(20-x)=740-37x cents
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EQUATION:
value + value = 706 cents
20x + 740-37x = 706
-17x=-34
x=2 (# of 20 cent stamps)
20-x = 18 (# of 37 cent stamps)
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Cheers,
Stan H.

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