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Math Question

Discussion in 'DAT Discussions' started by Linknprk, May 7, 2007.

  1. Linknprk

    2+ Year Member

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    I just seem to get this question! Any help would be appreciated!

    If y = (x+2)/(x-3) then which of the following represents x?

    A. (3y+2)/(y-1)
    B. (3y+2)/y
    C. (3y-2)/(y+1)
    D. 5y/(y+1)
    E. (3y-2)/(y-1)

    The answer is A but I don't know how to get to it. Please help!
    Thanks!
     
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  3. jdmsamurai

    2+ Year Member

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    easy

    y = (x+2)/(x-3)
    y(x-3) = x+2
    xy -3y = x+2
    xy - x = 3y +2
    x(y-1) = 3y+2
    x = (3y+2)/(y-1)

    done
     
  4. Linknprk

    2+ Year Member

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    wow. i completely tried to make that way more complicated than it actually is.
    thanks a lot
     

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