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Lilly volunteers at the library. She shelves 56 fiction books. The rest of the books she shelves are nonfiction books. She shelves a total of 115 books. How many nonfiction books does Lilly shelve? Use the variable b to represent the unknown quantity.

Respuesta :

Flippo
56 + b = 115 (first you must subtract 56 from both sides to get b by itself)
-56         -56

b = 59 Non Fiction books 

Hope this helps :)

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