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 57093: 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 number of 37 cent stamps be "x" ; Value of these is 37x cents
Number of 20 cent stamps is "20-x"; Value of these is 20(20-x)=400-20x cents
EQUATION:
value + value = 706 cents
37x+400-20x=706
17x=306
x=18 (number of 37 cent stamps)
20-x=2 (number of 20 cent stamps)
Cheers,
Stan H.
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