Question: Brianna reads two books a month. This year, she was given six new books as a gift, she bought eight new books, and she plans to borrow two fewer new books than she bought from the library. How many of her old books from her old book collection will she have to reread to have two books to read a month this year? Think carefully first, then make a decision:
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Brianna needs 12 * 2 = 24 books to get her through the year. She will borrow 8 - 2 = 6 new books from the library. With the books she was given, the books she bought, and the library books, she will have 6 + 8 + 6 = 20 new books to read this year. Thus, she will need to reread 24 - 20 = 4 of her old books this year. So the answer is 4.
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