Middle School Math
posted by Please Please Help .
Please help. I do not have any idea about how to get started on this or finish it.
A threedigit number increases by 9 if we exchange the second and third digits. The same threedigit number increases by 90 if we exchange the first and second digits. By how much will the value increase if we exchange the first and third digits?
Thank you

Bobpursley explained this answer yesterday.
http://www.jiskha.com/display.cgi?id=1328649370