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21 July, 08:50

Kims age was twice that of her sister. When you add Kim's age to her sisters age you, you get 36. How old is each sister?

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  1. 21 July, 09:20
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    Set kim's age to 2x. Set her sister's age to x. Now solve the equation:

    2x+x=36

    3x=36

    x=12.

    Remember, her sister's age was x, and x=12, so her sister is twelve. Kim's age is 12*2, so her age is 24.
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