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Solving for x

  1. Mar 4, 2009 #1
    1. The problem statement, all variables and given/known data
    How would you solve for x in y = (x+4)/(x+3)


    2. Relevant equations



    3. The attempt at a solution
    y(x+3) = (x+4)
    xy+3y=x+4
    -x+xy+3y=4
    x-xy-3y=-4

    ...... That is the closest to anything familiar I could come.

    This isn't really a homework question but how would you do this? Is it even possible?
     
  2. jcsd
  3. Mar 4, 2009 #2
    Well you can continue as follows:
    x-xy=3y-4
    x=(3y-4)/(1-y)
     
  4. Mar 4, 2009 #3
    Wow..... I can't believe that it was a simple 2 steps from there. I just seem to have a problem with solving for x when it is in a numerator and denominator (I had another problem like this and someone else had to figure it out for me)

    lol

    thanks
     
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