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15 December, 23:58

Maria bought seven boxes. A week later half of all her boxes were destroyed in a fire. There are now only 22 boxes left. With how many did she start?

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  1. 16 December, 00:01
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    Maria started with 37 boxes.

    Given:

    7 boxes bought

    half of the boxes were destroyed in the fire.

    22 boxes left

    Find the beginning number of boxes.

    Let x be the beginning number of boxes.

    (x + 7) / 2 = 22

    2 ((x+7) / 2) = 2 (22)

    x + 7 = 44

    x = 44 - 7

    x = 37

    To check:

    x + 7 = 37 + 7 = 44

    44 * 1/2 = 22

    22 = 22
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