# SOLUTION: A postal clerk sold 75 stamps for a total of \$10.85. Some of the stamps were 15-cent stamps and the remainder of the stamps were 13 cent stamps. How many of the stamps were 13 ce

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 Click here to see ALL problems on Mixture Word Problems Question 207497: A postal clerk sold 75 stamps for a total of \$10.85. Some of the stamps were 15-cent stamps and the remainder of the stamps were 13 cent stamps. How many of the stamps were 13 cent stamps?Answer by stanbon(57979)   (Show Source): You can put this solution on YOUR website!A postal clerk sold 75 stamps for a total of \$10.85. Some of the stamps were 15-cent stamps and the remainder of the stamps were 13 cent stamps. How many of the stamps were 13 cent stamps? ------------------------- Quantity Equation: f + t = 75 Value Equation:::15f+13t = 1085 cents --------------------------------------------- Multiply thru the Quantity Equation by 15 to get: 15f + 15t = 15*75 --- Subtract that from the Value Equation to get: -2t = 1085-15*75 -2t = -40 t = 20 (# of thirteen cent stamps) ====================================== Cheers, Stan H.