PLEASE HELP ME. I know I ask a lot, but I don’t know what I should come up with

Answer:
equation :
1. b + 5 = 3
2. 3b = - 6
3. 10b = -20
1. b = 3 - 5 = - 2
2. 3b/3 = - 6/3 = - 2
3. 10b / 10 = - 20 / 10 = - 2