That's different. You skipped out of the division aspect of the problem, that's what makes this unique.
6 / 2 (1 + 2) is really
6 / 2 x (1 + 2)
If the problem you said was 6/2 (Y + 1) = ...
You would get 3Y + 3 = ...
I guess you're correct
Then again, I'm still not sure.
I just meant to say that you could play with what's inside the parentheses and then division and multiplication should be interchangeable but i'm not sure anymore.