Answer:
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
