A=[1 2 3];
B=[4 5 6];
C=[7 8 9];
mat=[A;B;C];
if rank(mat)==3
    fprintf('Uklad jest liniowo niezalezny');
    return;
end
syms x y;
f1=x*B+y*C-A;
f2=x*A+y*C-B;
f3=x*A+y*B-C;
[x1,y1]=solve(f1);
[x2,y2]=solve(f2);
[x3,y3]=solve(f3);
v1=[x1 y1]
v2=[x2 y2]
v3=[x3 y3]