Yes, just rearrange the formula for finding the normalised value. Where $x_i$ is the original attribute, and $z_i$ is the normalised value:
\begin{align} z_i &= \frac{x_i - min(x)}{max(x) - min(x)} \\ x_i &= z_i(max(x) - min(x)) + min(x) \end{align}