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14 February, 09:56

acme phone company charges $21 a month plus 0.05 a minute. belltone phone charges $15 a month plus 0.11 a minute. write and solve an equation to determine how many minutes a month you must use for cost of using either company to be equal

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  1. 14 February, 13:54
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    Acme:.05x + $21. Belltone:.11x + $15

    .05x + $21 =.11x + $15

    (-.06x = - 6) 100

    6x = 600

    x = 100 minutes
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