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Math Help - How would you rearrange the following equation?

  1. #1
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    How would you rearrange the following equation?

    0 = PR^n - Q(R^n)-1)/R-1

    It needs to equal P. It's part of a modeling and problem solving question, I'm right with everything after the rearranging. Thank you.
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  2. #2
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    Quote Originally Posted by Liparulo View Post
    0 = PR^n - Q(R^n)-1)/R-1

    It needs to equal P. It's part of a modeling and problem solving question, I'm right with everything after the rearranging. Thank you.
    Do you mean: 0=\dfrac{PR^n-Q(R^n)-1}{R-1}

    or: 0=\dfrac{PR^n-QR^{n-1}}{R-1}

    or: 0=PR^n - \dfrac{QR^n-1}{R-1}

    or: 0=PR^n - \dfrac{QR^{n-1}}{R-1}
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  3. #3
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    Quote Originally Posted by earboth View Post

    or: 0=PR^n - \dfrac{QR^n-1}{R-1}
    This one. Sorry, I know it's a basic question and I should be able to do it, but I'm just not clicking at the moment.
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  4. #4
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    Quote Originally Posted by Liparulo View Post
    This one. Sorry, I know it's a basic question and I should be able to do it, but I'm just not clicking at the moment.
    1. Move the quotient to the other side of the equation:

    <br />
PR^n = \dfrac{QR^n-1}{R-1}

    and then divide by R^n

    <br />
P = \dfrac{QR^n-1}{R^n(R-1)}<br />
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  5. #5
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    Thank you very much. I knew it was simple algebra that was holding me back.
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