Relax

Respuesta :

B=0 because everything cancels out

Answer:

0

Explanation:

−9b − 4 + 4 + 9b

= −9b + −4 + 4 + 9b

Combine Like Terms

= −9b + −4 + 4 + 9b

= (−9b + 9b) + (−4 + 4)

= 0