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18 April, 16:28

Kelly is three years younger than her sister. The sum of their ages is 34 years. How old is Kelly and how old is her sister?

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  1. 18 April, 18:16
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    Kelly is 20

    Her sister is 14

    Step-by-step explanation:

    34 : 2 = 17 (average)

    17 + 3 = 20

    17 - 3 = 14
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