Question
A self-help book costs four times as much as a file. Gillian paid $3.60 for 2 books and 1 file. Find the cost of 1 file. Give your answer in dollars.
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A self-help book costs four times as much as a file. Gillian paid $3.60 for 2 books and 1 file. Find the cost of 1 file. Give your answer in dollars.