Question

8 – (3 + b) = b – 9

Answer 1

is it 7

Answer 2

8-3+-b=b-9 , 5-b=b-9 , 5+9=b+b
2b=14 ,b=7

Answer 3

yes elena :) ,thats right .

Answer 4

8 - (3 + b) = b - 9

1. Distribute the negative:
8 - 3 - b = b - 9

2. Place like terms on the same side:
8 - 3 + 9 = b + b
8 + 9 - 3 = 2b
17 - 3 = 2b

14 = 2b

Solve for b
14/2 = b
7 = b