Question
Last week, Tom had a total of 157 white and black files. Two weeks later, he sold 56 of all the white files and 3 black files. Now he has the same number of white and black files. How many files does he have in the end?
2 m

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Last week, Tom had a total of 157 white and black files. Two weeks later, he sold 56 of all the white files and 3 black files. Now he has the same number of white and black files. How many files does he have in the end?