Answer:
b=3
Explanation:
You want to put the variables on one side, so to get rid of the 3b, subtract 3b from both sides
2+3b-3b=5b-3b-4
2=2b-4
Then you want to get rid of the -4 so you add 4
2+4=2b-4+4
6=2b
Then, divide 6 by 2 to get b by itself
3=b