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14 May, 02:14

Shantel 's rare book collection contains 40 books. she donates 15% of her books to the national library, sells 3/5 of her books on the Internet. How many books remain in shantel's book collection?

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  1. 14 May, 02:36
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    Shantel donates 15% of the 40 books to the national library.

    40 (.15) = 6

    She also sells 3/5 of the 40 books or 60% of it.

    3/5 = x/40

    Cross multiply

    3 (40) = 5x

    120 = 5x

    Divide both sides by 5

    x = 24

    24 + 6 = 30

    Subtract the number of books she sold or donated

    40 - 30 = 10

    Shantel has 10 books left in her book collection.
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