Question

B-4-3b combining like terms​

Answer 1

B - 4 - 3B

=> -2B - 4

Answer 2

Answer: -2b-4

Ok, so I assume you meant b-4-3b. If not, then B-4-3b is the best you can get, since B and b are different in math.

Anyways, we can rearrange b-4-3b into b-3b-4. Calculating b-3b = -2b. That means -2b-4 is the answer.

Hope that helped,

-sirswagger21