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9 February, 21:43

It costs a flat fee of $3.15 to make an international call plus $0.05 for every minute that you talk. if you were charged $5.10 for making an international call, for how many minutes did you talk?

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  1. 9 February, 21:44
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    The equation would be 0.05x + 3.15 = 5.10

    0.05x = 1.95 (subtraction)

    x = 39 (division)

    39 minutes
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