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A postal clerk sold 50 postage stamps for $16.05. Some were 39-cent stamps and the rest were 24-cent stamps. How many 39-cent stamps were sold?
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A postal clerk sold 50 postage stamps for $16.05. Some were 39-cent stamps and the rest were 24-cent stamps. How many 39-cent stamps were sold?

User JSmyth
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1 Answer

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39x + 24(50 - x) = 1,605
13x + 8(50 - x) = 535
13x + 400 - 8x = 535
5x = 135
x = 27

Answer: 27 of 39-cent stamps were sold
User Wolfgang Ulmer
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