x+b+2b+8(9-5b)(divide)9

Question

x+b+2b+8(9-5b)(divide)9

You don't show clearly what is divided by 9;i.e.everything or just 8(9-5b). I will assume the equation is this.
[x+b+2b+8(9-5b)]/9
First, clear the innermost parentheses.
(x+b+2b+72-40b)/9
combine terms.
(x-37b+72)/9
You don't say what you want to do with this number.

My math homework says that the price of 5 lb's of flour was 80 cents last year.There is a 5% increase in the price of flour this year. How muchis this price increased.

Price increase =5% of 80 cents
=