a cheap way to do it, is just using the compound interest formula
the town's population is increasing 2% per annum, that means, compound interest... thus [tex]\bf \qquad \textit{Compound Interest Earned Amount}
\\\\\\
A=P\left(1+\frac{r}{n}\right)^{nt}
\quad
\begin{cases}
A=\textit{current amount}\to &\boxed{y}\\
P=\textit{original amount}\to &\$23000\\
r=rate\to 2\%\to \frac{2}{100}\to &0.02\\
n=
\begin{array}{llll}
\textit{times it compounds per year}\\
\textit{per year, once}
\end{array}\to &1\\
t=years\to &\boxed{x}
\end{cases}[/tex]
