Respuesta :

vialia

Answer:

b = 10

Step-by-step explanation:

"7b - 2" is supplementary to "3b + 2"

7b - 2 + 3b + 2 = 180

7b + 3b - 2 + 2 = 180

10b + 0 = 180

10b/10 - 180/10

b = 18