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Math Help - Equation Manipulation

  1. #1
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    Equation Manipulation

    Please manipulate these equations as specified, so that I can compare them to the other problems I need to do.

    1. (w/v) = (g/(v-w)) to get 1/v + 1/w = 1/g
    2. (w - g) = f(1/(v-g)) into 1/v + 1/w = 1/g
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  2. #2
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    More information please

    Hello Audaciity
    Quote Originally Posted by Audaciity View Post
    Please manipulate these equations as specified, so that I can compare them to the other problems I need to do.

    1. (w/v) = (g/(v-w)) to get 1/v + 1/w = 1/g
    2. (w - g) = f(1/(v-g)) into 1/v + 1/w = 1/g
    I think you must have misunderstood the questions here. Are f and g functions? Give us the complete question please, because what you have written here doesn't make sense.

    Grandad
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  3. #3
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    They are equations, not functions.

    I am asking people to show the steps to rearrange (and manipulate) the equations.

    How do I get from w/v = g/(v-w)
    to 1/v + 1/w = 1/g ?

    How do I get from w-g = f(1/(v-g))
    to 1/v + 1/w = 1/g ?
    Last edited by mr fantastic; February 10th 2010 at 02:57 AM. Reason: Merged posts
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  4. #4
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    Hello Audaciity
    Quote Originally Posted by Audaciity View Post
    I am asking people to show the steps to rearrange (and manipulate) the equations.

    How do I get from w/v = g/(v-w)
    to 1/v + 1/w = 1/g ?

    How do I get from w-g = f(1/(v-g))
    to 1/v + 1/w = 1/g ?
    I have already replied to your question. Unless you have anything further to tell me, I repeat: the question doesn't make sense.

    Grandad
    Last edited by mr fantastic; February 10th 2010 at 02:58 AM.
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  5. #5
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    Quote Originally Posted by Audaciity View Post
    Please manipulate these equations as specified, so that I can compare them to the other problems I need to do.

    1. (w/v) = (g/(v-w)) to get 1/v + 1/w = 1/g
    2. (w - g) = f(1/(v-g)) into 1/v + 1/w = 1/g
    The point Grandad was making is that you can't change from one to the other, they simply aren't equivalent. From w/v= g/(v-w), you can get that 1/g= v/(w(v-w)) but that is NOT equal to 1/v+ 1/w.

    The second one has an "f" in it but the equation you want to change it into doesn't. Again, that is NOT possible.
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