HELP!!!

Kalaiah19:

:| what is 9n - 9?

I think it is just 'n'

Not sure who came up with the answer 'n' but it isn't right.

I think you need to factorise (simple):

9n - 9 = 9(n-1).


I am guessing this is part of an equation: 9(n-1) = 0? Which implies n = 1