% How to slove linear equations
% consider a linear equation
%               ax + by = p
%               cx + dy = q
% This equation needs to be expressed in matrix form for
% Octave to be able to solve it. That is:
%               A.X=B
% Where A is the coefficients of the left side
%               A=[a b;c d] and B=[x y]
%  If A is invertible, X = (1/A)B, or, using Matlab notation, X = A\B.
% -----------------------------------------------------------------------
% Now an example:
% 4x+3y = 10
% 5x+6y = 32
a=[4 3;5 6];
b=[10;32];
x=a\b