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6 March, 08:26

Mrs. Smythe is twice as old as her daughter Samantha. Ten years ago the sum of their ages was 46 years. How old is Mrs. Smythe?

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  1. 6 March, 08:46
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    Mrs. Smythe = x

    Daughter = y

    x = 2y

    (x - 10) + (y - 10) = 46

    x - 10 + y - 10 = 46

    x + y - 20 = 46

    x + y = 66

    Put 2y in for x

    2y + y = 66

    3y = 66

    y = 66/3

    y = 22

    The daughter is 22

    The mother = 44
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