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Thread: Rearrange the formula

  1. #1
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    Rearrange the formula

    So I've been trying for the last hour, to no avail.

    p = 2+j/J-3

    Rearrange the formula so j is the subject.
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  2. #2
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    Re: Rearrange the formula

    p = 2+j/J-3
    The equation as your wrote it is ambiguous. Please rewrite in a non ambiguous way.

    eg, do you mean:

    $\displaystyle p = \frac{2+j}{j-3}$

    or

    $\displaystyle p = \frac{2+j}{j} -3$

    or...etc
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  3. #3
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    Re: Rearrange the formula

    $\displaystyle p = \frac{2+j}{j-3}$
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  4. #4
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    Re: Rearrange the formula

    $\displaystyle p=\frac{2+j}{j-3}$

    (multiply by [j-3])

    $\displaystyle (j-3)p={2+j}$


    expand the brackets on the left, collect terms, and finish.

    Spoiler:

    $\displaystyle (j-3)p={2+j}$

    $\displaystyle jp-3p={2+j}$

    $\displaystyle jp-j -3p=2$

    $\displaystyle j(p-1) -3p=2$

    $\displaystyle j(p-1) =2+3p$

    $\displaystyle j=\frac{2+3p}{(p-1)}$


    EDIT: spoiler added
    Last edited by SpringFan25; Oct 5th 2011 at 12:54 PM.
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  5. #5
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    Re: Rearrange the formula

    Thank you!
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  6. #6
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    Re: Rearrange the formula

    no problem
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