Question

b-9+6b=30

Answer 1

hi welcome to Openstudy!

what do you have to do with the expression? do you have to solve for b?

I will assume that you have to solve fore b.
so you have \(b-9+6b=30\)
first things you have to do is to \(\sf collect\ like\ terms\)
it will be: \(b+6b=30+9\) -> to get this I just add 9 on both sides to transpose 9 to the right side.

then you have to simplify this. tell me what you got and i'll check it and tell you what's the next thing you have to do.