Cramer's rule is a clever solution to the classical system of linear equations Ax=b: [\begin{bmatrix} a_{11} & a_{12} & a_{13} \ a_{21} & a_{22} & a_{23} \ a_{31} & a_{32} & a_{33} \ \end{bmatrix} \begin{bmatrix}x_1 \ x_2 \ x_3\end{bmatrix} = \begin{bmatrix}b_1 \ b_2 \ b_3\end …