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Math Help - simple transposition

  1. #1
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    simple transposition

    d = (r/1+rt) solving for r


    I just can't seem to solve for r on this one. I know this question is pretty simple, but I'm studying on my own so I can't ask my instructor.
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  2. #2
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    Re: simple transposition

    d = (r/1+rt)

    d+rtd=r
    d=r(1-td)

    r = (d/1-td)
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  3. #3
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    Re: simple transposition

    Quote Originally Posted by kingsolomonsgrave View Post
    d = (r/1+rt) solving for r


    I just can't seem to solve for r on this one. I know this question is pretty simple, but I'm studying on my own so I can't ask my instructor.
    Hi kingsolomonsgrave,

    I'm not sure why you enclosed the right side of your equation in parentheses. And your right side is a bit ambiguous. Is it

    d=\frac{r}{1+rt}

    I'll assume it is and proceed from there.

    First, multiply both sides of your equation by 1 + rt

    d+drt = r

    Next, transpose drt to the right side.

    d = r - drt

    Factor an r out of the right side.

    d = r(1-dt)

    Finally, divide both sides by 1 - dt

    \frac{d}{1-dt} = r
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  4. #4
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    Re: simple transposition

    thanks!!!
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