chongfolin chongfolin

07-10-2022
Mathematics

Answered

At a bookstore, the ratio of the number of erasers to the total number of files and rulers is 2: 3. After 146 erasers were sold, the ratio of the number of erasers to the number of files to the number of rulers was 6:3:7. How many files were there in the bookstore?

Answer :

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