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25 April, 05:36

Carol's book shelf has 4 shelves with 6 books on each. Her Brother Robert has 3 shelves with 7 books on each. They want to combine their books. If they put 9 books on a shelf, how many shelves will they need?

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  1. 25 April, 08:39
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    they will need 5 shelves because 9x5=45.

    6x4 = 24

    7x3=21

    If you add 24 and 21 then you get 45.
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