Question 676129
First, bifurcate this problem: 6(b+3)             worry about 2(b+5) later 
6(b+3) = 6b + 18. You simply multiply the 6 by the b and the 6 by the 3. 
Then, we work on the second bifurcation: 2(b+5). This equals 2b + 10 for the same reasons as the one above. 

Thus, our problem now reads: 6b+18+2b+10 
You add like figures which yields: 8b + 28

8b + 28 is the most precise you can get in this problem, so 8b+28 is your answer.