MATLAB: Make matrix by using vectors created by loop

Question

%I want to make matrix by all vectors of x for all values of r in following code
%save it to  'Matrics'
b =[2,3,5]';
for r = -1:0.1:1
        A =[5,(2*r),r   ;
            3,6    ,(2*r-1);
            2,(r-1),3*r    ];
x = b\A;
%Matrics = ????
end

Answer 1

allX = [];
[...]
allX = [allX; x];