$\left\{\begin{matrix}R=\frac{5\text{bmod}x}{s_{10}}\text{, }&s_{10}\neq 0\\R\in \mathrm{C}\text{, }&5\text{bmod}x=0\text{ and }s_{10}=0\end{matrix}\right.$

$\left\{\begin{matrix}s_{10}=\frac{5\text{bmod}x}{R}\text{, }&R\neq 0\\s_{10}\in \mathrm{C}\text{, }&5\text{bmod}x=0\text{ and }R=0\end{matrix}\right.$

$\left\{\begin{matrix}R=\frac{5\text{bmod}x}{s_{10}}\text{, }&s_{10}\neq 0\\R\in \mathrm{R}\text{, }&5\text{bmod}x=0\text{ and }s_{10}=0\end{matrix}\right.$

$\left\{\begin{matrix}s_{10}=\frac{5\text{bmod}x}{R}\text{, }&R\neq 0\\s_{10}\in \mathrm{R}\text{, }&5\text{bmod}x=0\text{ and }R=0\end{matrix}\right.$