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There were a total of 270 books on the two bookshelves. Four-fifths of A's books had been borrowed, and three-quarters of B's books had been borrowed. The remaining books on the two bookshelves were equal. The two bookshelves were originally…

2024-09-10 23:19
How many books?
1 answer

The original number of books on bookshelf A was 270/(4+5)×4=256 books. The original number of books on bookshelf B was 270/(4+5)×3=180 books. There were a total of 256+180=436 books on the two bookshelves. After 4/4 of bookshelf A was borrowed, the remaining books on bookshelf A were 256-4×4=228 books. After 1/3 of bookshelf B was borrowed, the remaining books on bookshelf B were:180-3×1=157 books. Therefore, the remaining books on the two bookshelves were equal to their total:436-228=208 books.

There are 540 books on the two bookshelves A and B. A lent 4/5, B lent 3/4, the remaining bookcases on the bookshelves A, etc. How many books are there on the original bookshelves?
1 answer
2024-09-11 00:26
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1 answer
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