![][matrix]
[matrix]: http://latex.codecogs.com/svg.latex?\left{\begin{array}{ll}a_1x+b_1y+c_1z&=d_1+e_1\a_2x+b_2y&=d_2\a_3x+b_3y+c_3z&=d_3\end{array}\right.
![][matrix]
[matrix]: http://latex.codecogs.com/svg.latex?\left{\begin{array}{ll}a_1x+b_1y+c_1z&=d_1+e_1\a_2x+b_2y&=d_2\a_3x+b_3y+c_3z&=d_3\end{array}\right.
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