Answer:
b = 4
Step-by-step explanation:
[tex]2(-2b) + 2b = -8[/tex]
[tex]=> -4b + 2b = -8[/tex]
[tex]=> -2b = -8[/tex]
[tex]=> \frac{-2b}{-2} = \frac{-8}{-2}[/tex]
[tex]=> b = 4[/tex]