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17 August, 01:55

Rose bought 300 packs of peanuts. she bought boxes of 12 packs and boxes of 6 packs to get the 300 packs. how many boxes of 12 packs did she buy if she bought 35 boxes in all?

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  1. 17 August, 03:44
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    X + y = 35

    x = 35-y

    12x + 6y = 300

    12 (35-y) + 6y = 300

    420 - 12y + 6y = 300

    420 - 6y = 300

    -6y = - 120

    y = - 120 / - 6

    y = 20

    x = 35-20 = 15

    she bough 15 of the 12 packs
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