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13 January, 16:50

A cellphone company has a basic monthly plan of $30 plus 0.35 for any minutes used over 500 before receiving his statement John saw he was charged a total of $40.85 write and solve an equation to determine how many minutes he must have used during the month write an equation and solve?

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  1. 13 January, 19:18
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    The equation to this problem is:

    $30 + $0.35. x = $40.85

    where x is the amount of minutes that exceeds the 500-minute free limit.

    $30 + $0.35. x = $40.85

    $0.35. x = $40.85 - $30

    x = $10.85 / $0.35

    x = 31

    The total amount of minutes used is 31 (charged) + 500 (free) = 531.

    Response: 531 minutes.

    :-)
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