>> % exercise 11(d) Sec 1.4 >>>>>>> XA+C=X
>> A = [5 3; 3 2]; B = [6 2; 2 4]; C = [4 -2; -6 3];
>> I = eye(2)

I =

     1     0
     0     1

>> X = - inv(A-I) * C

X =

    4.4000   -2.2000
   -7.2000    3.6000