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>>> A = mat('[1 3 5; 2 5 1; 2 3 8]')

>>> b = mat('[10;8;3]')

>>> A.I*b

Matrix([[-9.28],

       [ 5.16],

       [ 0.76]])

>>> linalg.solve(A,b)

array([[-9.28],

       [ 5.16],

       [ 0.76]])