Question
At a shop, Alice paid $18 for 6 items: 2 files and 4 pencils. The total cost of 2 files is $6 more than the total cost of 4 pencils. How much did 1 file cost?
4 m

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At a shop, Alice paid $18 for 6 items: 2 files and 4 pencils. The total cost of 2 files is $6 more than the total cost of 4 pencils. How much did 1 file cost?