- #1

- 4

- 0

Let x be the first digit and y be the second digit

(10y + x) - (10x +y) = 9

and

y -x =1

(10y + x) - (10x +y) = 9

9y -9x = 9

y - x = 1

I find out that both equations are the same does that mean that there isn't enough information or have I done something wrong?

From messing around I find the number is 12