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Math Help - Need help solving equation

  1. #1
    Member
    Joined
    Sep 2007
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    81

    Need help solving equation

    Hi all,

    I'm not in High School but I figure the question is around this level so I'll post it here.

    Essentially I'm trying to post this formula in excel, so I need to solve x, or have it so I can plug in the variables I know and get the result.

    The forumla currently is

    S = D - X / CX + 1.5V

    S, D, C, V are all known.

    Any help here would be appreciated. If you need any more information again please let me know.

    -Peleus.
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  2. #2
    MHF Contributor
    Joined
    Apr 2005
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    S = D - X / CX + 1.5V

    What is that?

    Is it
    S = (D-X) / (CX +1.5V) ?

    Or,
    S = D -(X /CX) +1.5V ? <-----cannot be.

    Or,
    S = D -(X /(CX +1.5V)) ?

    Or,....?
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  3. #3
    Grand Panjandrum
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    Quote Originally Posted by Peleus View Post
    Hi all,

    I'm not in High School but I figure the question is around this level so I'll post it here.

    Essentially I'm trying to post this formula in excel, so I need to solve x, or have it so I can plug in the variables I know and get the result.

    The forumla currently is

    S = D - X / CX + 1.5V

    S, D, C, V are all known.

    Any help here would be appreciated. If you need any more information again please let me know.

    -Peleus.
    Use brackets to make the meaning clear, if you gave such a formula to
    Excel it would give you garbage, so why do that to us?

    Lets assume you mean:

    S = (D - X) / (C*X + 1.5*V)

    then:

    (C*X+1.5*V)S = D - X

    or:

    X*(C+1) = D -1.5*V*S

    so:

    X = (D - 1.5*V*S)/(C+1)

    RonL
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