Let's solve together :)
Group the like terms.
2b-5b+8+3=-13+8b-5
Add congruent elements.
-3b+8+3=-13+8b-5
Add up.
-3b+11=-13+8b-5
Group like terms.
-3b+11=8b-13-5
Subtract.
-3b+11=8b-18
Subtract 11 from both sides.
-3b+11-11=8b-18-11
-3b=8b-29
Subtract 8b from both sides.
-11b=-29
Divide -11b from both sides.
b = 29/11
Have such a great day :)
