Respuesta :

Answer:

b = 110°

Step-by-step explanation:

The sum of two opposite interior angles is equal to an exterior angle.

(b - 35°) + (b - 44°) = (b + 31°)

Opening the brackets;

b + b - 35° - 44° = b + 31°

2b - 79° = b + 31°

2b - b = 31° + 79°

b = 110°