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10 November, 11:01

My sister is 14 years old. My brother says that his age minus tweleve is equal to my sister's age. How old is my brother

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  1. 10 November, 11:13
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    Take his age, subtract off 12 and you get the sister's age

    (brother's age) - 12 = sister's age

    x - 12 = 14

    x - 12+12 = 14+12 ... add 12 to both sides to undo "minus 12"

    x = 26

    The brother is 26 years old
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