Question 1142492
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From the condition, you have this equation


    M = 6*(N-8),


and you know that M = 30.


Hence, the equation becomes


    30 = 6*(N-8),


and you can easily solve it


    30/6 = N - 8


    5    = N - 8


    N = 5 + 8 = 13.


<U>ANSWER</U>.  Nancy is 13 years old.
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