## Numpy linalg: linear system with unlikely results

Considering the following matrix equation:
x=Ab
where:
In[1]:A
Out[1]:
matrix([[ 0.477, -0.277, -0.2 ],
[-0.277, 0.444, -0.167],
[-0.2 , -0.167, 0.367]])
In[2]: b
Out[2]: [0, 60, 40]
how come that when I use numpy.linalg() ...

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