% Numerical Mathematics and Computing, Fifth Edition
% Ward Cheney & David Kincaid
% Brooks/Cole Publ. Co.
% (c) 2004
%
% file: gauss_elim2.m

%
% solve linear systems Ax=b
%
A = [ 3  -13  9    3
     -6    4  1  -18
      6   -2  2    4
     12   -8  6   10]
b = [-19
     -34
      16
      26]
x = A\b