Circuito de dos mallas

import numpy as np

M = np.array([[660,-220],[-220,660]])
Mi = np.linalg.inv(M)
B= np.array([[9],[1.5]])
X=np.dot(Mi,B)

print('Matrix M')
print(M)
print('Matrix inversa')
print(Mi)
print('Vector B')
print(B)
print('vector I')
print(X)