Answer:
5B + 8
Explanation:
the first step is to use the distributive property, so if you multiply 4 by 3B you get 12B, and 4 times 2 equals 8. so you are left with 12B+8-7B
now the next step is to combine like terms, so you take 12B and -7B you are left with 5B
so the answer is 5B + 8
i might have made an error as i am also learning algebra now but i hope this helps!
:) Good luck!