Question 78
For any positive integer $N$ we denote by $\overline\{N\}$ the number obtained by writing the digits of $N$ from right to left. For instance, if $N = 2395$ then $\overline\{N\} = 5932$ and if $N = 3780$ then $\overline\{N\} = 873$.
Find all positive integers $N$ such that $N - \overline\{N\} = 9$.
Find all positive integers $N$ such that $N - \overline\{N\} = 9$.