Question
Mr. Thia wants to buy the same type of files. If he buys 7 files, he will have $4 left. If he buys 11 files, he will be short of $6.80. How much do 7 files cost?
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Mr. Thia wants to buy the same type of files. If he buys 7 files, he will have $4 left. If he buys 11 files, he will be short of $6.80. How much do 7 files cost?