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Toni can carry up to 18 1b in her backpack. Her lunch weighs 1 1b, her gym clothes weigh 2 1b, and her books (b) weigh 3 1b each. How many books can she carry in her backpack?

1 Answer

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First we find how much weight is in her book bag without any books.
1+2 = 3
Then we find how much weight left that she can carry.
18-3 = 15
Now we divide by the weight of each book to see how many she can carry.
15/3 is 5.
She can carry 5 books!
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