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Math Help - Expression problem

  1. #1
    Junior Member madmax29's Avatar
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    Expression problem

    Hi there

    im having problems trying to make p the subject, because p is on the top and bottom of the RHS;

    Z=(pq)/p-q

    any ideas, also, what kind of problem is this?
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  2. #2
    MHF Contributor
    skeeter's Avatar
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    Quote Originally Posted by madmax29 View Post
    Hi there

    im having problems trying to make p the subject, because p is on the top and bottom of the RHS;

    Z=(pq)/p-q

    any ideas, also, what kind of problem is this?
    solving a literal equation for a variable ...

    \displaystyle z = \frac{pq}{p-q}

    z(p-q) = pq

    zp-zq=pq

    zp-pq=zq

    p(z-q)=zq

    \displaystyle p=\frac{zq}{z-q}
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  3. #3
    Junior Member madmax29's Avatar
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    thanks, i was pretty close and got down to the third line,
    however i messed up my transpostion after that, now its ok, i see now they swap to make 'zq' the subject..kk
    "simples" after that!
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