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22 October, 10:15

The running time for movie a is 40 minutes more than twice the running time for movie

b. if the running time for movie a is subtracted from triple the running time for movie b, the result is 45 minutes. find the running times for each movie.

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  1. 22 October, 13:25
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    3b - a = 45

    a = 2b + 40

    Solve simultaneously.

    3b - (2b + 40) = 45

    3b - 2b - 40 = 45

    b = 45 + 40

    b = 95min (1 hour 35 min)

    a = 2 (95) + 40

    a = 230min (3 hour 50 min)
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