G_matrix = [ 7 -1; ...
            -1  3]
I_matrix = [48 -24]'        % Colum vector
% Matrix Solution
% G_matrix * Vx = I_matrix

% Ax = B
% x = inv(A) * B
% V1 = 6 V, V2 = -6 V
R3 = 12; R1 = 2; R2 = 6;
%Vx = inv(G_matrix) * I_matrix
detG = det(G_matrix);
IG_matrix1 = [48     -1; ...
              -24     3]
IG_matrix2 = [7     48; ...
             -1     -24] 
V1 = det(IG_matrix1)/detG
V2 = det(IG_matrix2)/detG
IR3 = (V1 - V2)/R3
IR1 = V1/R1
IR2 = V2/R2



          