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Homework Help: Find symetric equations for the line of intersection of the planes

  1. Dec 6, 2008 #1
    1. The problem statement, all variables and given/known data

    Find symmetric equations for the line of intersection of the planes

    2. Relevant equations

    5x - 2y - 2z = 1

    4x + y + z = 6

    3. The attempt at a solution

    I interpret this problem to say that I need to find a line of intersection of the two planes. I think I add them together and get 9x -y -z = 7.

    After which, I need to find symmetric equations of that line and I think that is what I am having trouble with. I would like a little background into what a symmetric equation is. The book says that I need to first find a parametric equation then solve for t. Thanks!
  2. jcsd
  3. Dec 6, 2008 #2
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