math

Joan is 'y' years old. Her father is 4 times as old as she is and 28 years older than her brother. A-Find in terms of y, the age of Joan's brother. B- If 'y' =12, how old is her brother?

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  1. father = 4y = brother+28
    brother = father-28, so 4y-28

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  2. 1+1=

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  3. 1+1+

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  4. J=8
    F=4y
    B=F-28 = 4y-28

    If y=12 => B=4*12-28 =48-28=20
    The brother is 20.

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