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Homework Help: Help with 7x7 gauss jordan elimination program

  1. Sep 21, 2008 #1
    1. The problem statement, all variables and given/known data

    Hi, im new to gauss jordan elimination and our teacher onlt taught us how to solve a 3x3 equation and gave us a 7x7 problem to answer due tom.

    2m + 3n - p + q + 2r - s + 2t = 1
    m - n + p - q + r + s + t = 2
    2m + 2n - 2p + q - 2r + s - t = 1
    m - 2p + q - r - s + t = 1
    m - 2n + p - q + r + s + t = 2
    m + 2n + 2p + 2q + r - s + 2t = 1
    m - n - 2p - q - r + s + t = 2



    2. Relevant equations

    2m + 3n - p + q + 2r - s + 2t = 1
    m - n + p - q + r + s + t = 2
    2m + 2n - 2p + q - 2r + s - t = 1
    m - 2p + q - r - s + t = 1
    m - 2n + p - q + r + s + t = 2
    m + 2n + 2p + 2q + r - s + 2t = 1
    m - n - 2p - q - r + s + t = 2

    3. The attempt at a solution

    i tried solving it thrice . . . using different methods i saw on the internet, but im scared i dont want to fail. I realy need help pls help me out dudes.

    tahnks!
     
  2. jcsd
  3. Sep 21, 2008 #2

    Defennder

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    Homework Helper

    First thing you should do is to write out the equations in the form of a matrix:

    The entries of the matrix should consist only of the co-efficients of the unknowns. Then just juxtapose the numbers on the RHS of the system of equations to form an augmented matrix. Then perform row-reduction. Where are you stuck? It's hard to help if you don't show any work.
     
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