Question
Mr. Choo wants to buy the same type of files. If he buys 7 files, he will have $3 left. If he buys 9 files, he will be short of $8.50. How much do 7 files cost?
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Mr. Choo wants to buy the same type of files. If he buys 7 files, he will have $3 left. If he buys 9 files, he will be short of $8.50. How much do 7 files cost?