R_matrix = [11 -3 -8; -3 10 -5; -8 -5 23]
V_matrix = [15 0 0]'        % Colum vector
% Matrix Solution
% R_matrix * I = V_matrix
% I = V_matrix \ R_matrix
% Eq_I3 = [11 -3 15; -3 10 0; -8 -5 0];
% Ax = B
% x = inv(A) * B
Ix = inv(R_matrix) * V_matrix
% Solution using Determinants
Eq_I3 = [ 11  -3  15; ...
          -3  10  0; ...
          -8  -5  0]
I3 = det(Eq_I3)/det(R_matrix)    % I3 = 1.22 amp

          