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Mathematics, 23.07.2019 14:30 tweetybird69903

There are four shelves of books along a wall in the library. on the top shelf, 16 of the 126 books are checked out. on the second shelf, 8 of the 137 books are checked out. on the bottom shelf, 17 of the 138 books are checked out. how many books are currently on the four shelves?

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