8 - (3+b) = b-9 ion understand this

b = 7

Step-by-step explanation:

Given

8 - (3 + b) = b - 9 ← distribute parenthesis on the left by - 1

8 - 3 - b = b - 9, that is

5 - b = b - 9 (subtract b from both sides)

5 - 2b = - 9 (subtract 5 from both sides)

- 2b = - 14 (divide both sides by - 2)

b = 7