Mathematics, 16.07.2020 04:01, daniellealex

Several books are placed on the bottom three shelves of a bookcase. When 1 book was taken from the first shelf, 2 books were taken from the second shelf, 3 books were taken from the third shelf, and all these books were placed on the top fourth shelf, the quantity of books on all the shelves became equal. How many books are in the bookcase?

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Several books are placed on the bottom three shelves of a bookcase. When 1 book was taken from the f...