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25 January, 05:50

Katie is twice as old as her sister Mara. The sum of their ages is 24. Find their ages.

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  1. 25 January, 08:29
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    So k=katie's' age

    m=mara's age

    k is 2 times as old as m

    k=2m

    sum is 24

    add means sum

    k+m=24

    so we have

    k+m=24 and

    k=2m

    subsitute

    2m+m=24

    add

    3m=24

    divide both sides by 3

    m=8

    subsitute again

    k=2m

    k=2 (8)

    k=16

    katie=16

    mara=8
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