1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Solving Systems of Linear Equations (Echelon Matrices)

  1. Feb 18, 2016 #1
    1. The problem statement, all variables and given/known data
    find the general solution of the given system of equations:
    http://puu.sh/ncKaS/57a333f5b9.png [Broken]

    2. Relevant equations
    Row Echelon Operations

    3. The attempt at a solution
    http://puu.sh/ncKcm/3e2b2bd5ab.jpg [Broken]

    The correct answer given is x = 1, y = 1, z = 2, w = −3

    I have done quite a few of these now around 5-6 and have gotten 3 correct. I don't know what my mistake with this one is. We are using Gaussian elimination.
    Last edited by a moderator: May 7, 2017
  2. jcsd
  3. Feb 18, 2016 #2
    When you add 18 times r3 to r4, the last term of row 3 is 16/14*18 not 16/4*18
  4. Feb 18, 2016 #3
    Ahhh. Thanks soo much.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Discussions: Solving Systems of Linear Equations (Echelon Matrices)