$$\frac{10^{4}-x}{10^{3-3x}}=\frac{x0}{2X+2}}$$
$\left\{\begin{matrix}X=-\frac{x\times 1000^{x}+500x_{0}-10000\times 1000^{x}}{\left(x-10000\right)\times 10^{3x}}\text{, }&x_{0}\neq 0\text{ and }x\neq 10000\\X\neq -1\text{, }&x=10000\text{ and }x_{0}=0\end{matrix}\right.$