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Homework Help: Solve for 'x' (with 4 variables and 1 equation)

  1. Aug 2, 2012 #1
    1. The problem statement, all variables and given/known data
    [tex]ac + bc = (a - c)(a + b) - xabcd^2[/tex]

    2. Relevant equations
    Various factoring rules (difference of two squares, etc.)

    3. The attempt at a solution
    I got it expanded to:

    [tex]ac + bc = a^2 + ab - ac - bc - xabcd^2\\0 = a^2 + ab - 2ac - bc - bd - xabcd^2[/tex]

    I tried factoring different ways, but it didn't really get me anywhere, and there aren't any "special" factoring rules that I can identify immediately here.

    Never mind, I wrote down the problem incorrectly
    Last edited: Aug 2, 2012
  2. jcsd
  3. Aug 2, 2012 #2


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    Homework Helper

    Think of this:
    What if you were asked to make x the subject (in other words, solve for x by putting it alone on one side of the equation) in the equation


    Can you solve this?
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