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3 January, 16:00

Diego has 7 packs of markers. Each pack has x markers in it. After Lin gives him 9 more markers, he has a total of 30 markers

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  1. 3 January, 16:23
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    For this case we must find:

    x = the number of marbles in a package.

    For this, according to the statement we have the following equation:

    7x + 9 = 30

    Clearing x we have:

    7x = 30-9

    x = 21/7

    x = 3 marbles

    Answer:

    Each pack of marbles contains 3 marbles
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