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4 June, 06:53

Lucy is three times as old as Alex.

Lucy is 7 years older than Megan.

The sum of their ages is 126.

Find the ratio of Alex's age to Lucy's age to Megan's age.

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  1. 4 June, 09:54
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    Alex=x

    Lucy=3x

    Megan=3x-7

    Sum of their ages=126

    x+3x+3x-7=126

    7x-7=126

    7x=126+7

    7x=133

    x=133/7

    x=19

    So Alex's age=19

    Lucy's age=3*19=57

    Megan's age=3*19-7

    57-7=50

    Ratio of their ages = 19:57:50
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