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9 June, 11:21

A gym is selling monthly membership for $30 each and reusable water bottles for $7 each. the gym needs to make $1050 by the end of the month

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  1. 9 June, 14:11
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    X = gym memberships, and y = bottles of water

    30x + 7y = 1050 ... when x = 28

    30 (28) + 7y = 1050

    840 + 7y = 1050

    7y = 1050 - 840

    7y = 210

    y = 210/7

    y = 30 ... so he would have to sell 30 water bottles
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