Respuesta :

Answer:

x = 10

Step-by-step explanation:

These angles are same side interior angles.

This means that (11x + 10) + (10x - 40) = 180

Solve for x:

11x + 10 + 10x - 40 = 180

21x - 30 = 180

      +30     +30

21x = 210

/21      /21

x = 10