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Math Help - basic algebra formula question

  1. #1
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    basic algebra formula question

    I have to solve for n

    A = q1 + q2 + q3/n

    The answer in that back of the book has q1 + q2 + q3/a = n
    how did it get that? I always end up with multiplication.

    Thank you for any help, its very appreciated
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  2. #2
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    I simply cannot read this posting. What does it say?
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  3. #3
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    You have forgotten the brackets, which are important in this.

    a = \dfrac{q_1 + q_2 + q_3}{n}

    a \times n=q_1 + q_2 + q_3

    Remember that a*n = n*a
    n \times a=q_1 + q_2 + q_3

    n=\dfrac{q_1 + q_2 + q_3}{a}



    If the equation was:

    a =q_1 + q_2 + \dfrac{ q_3}{n}

    a - q_1 - q_2  =\dfrac{ q_3}{n}

    a*n - q_1*n - q_2*n  = q_3

    n(a - q_1 - q_2)  = q_3

    n= \dfrac{q_3}{a - q_1 - q_2}
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