Question
Mr. Koh wants to buy the same type of pens. If he buys 9 pens, he will have $5 left. If he buys 11 pens, he will be short of $6.50. How much do 9 pens cost?
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Mr. Koh wants to buy the same type of pens. If he buys 9 pens, he will have $5 left. If he buys 11 pens, he will be short of $6.50. How much do 9 pens cost?