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12 June, 09:38

A student studied 18 hours in one week. What is the total number of hours he will have to study during the next week in order to average 2 hours of study per day for the entire 14-day period?

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  1. 12 June, 10:54
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    Step-by-step explanation:

    [ (2 hours) / (1 day) ] (14 days) = (18+x) hours

    Let's note that the unit of day is in the numerator and denominator. It cancels

    [ (2 hours) / (1 day) ] (14 days) = (18 hours) + (x hours)

    (2 hours) (14) = (18+x) hours

    Let's note that the unit of hours is in the numerators of both sides of the equation. It cancels

    (2 hours) (14) = (18+x) hours

    (2) (14) = 18+x

    28=18+x

    10=x

    HE WILL HAVE TO STUDY 10 HOURS.
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