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4 September, 14:00

Sadie finished her math test in sixteen minutes less than three times the amount of times it took her friend Laura to finish. if their combined times was 1 hour and 8 minutes, how long did it take Sadie?

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  1. 4 September, 15:31
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    Sadie took 47 minutes to finish her test.

    Step-by-step explanation:

    Let Laura's time be x minutes.

    Then we have:

    x + 3x - 16 = 68

    4x = 84

    x = 21 minutes.

    So Sadie took 3 (21) - 16 = 63-16

    = 47 minutes.
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