Respuesta :

Answer:

18

Step-by-step explanation:

Consecutive interior angles are supplementary, therefore 180 - 8x = angle C.

Alternate interior angles are congruent, so angle C is equal to 2x.

180 - 8x = angle C

Substitute angle C with 2x

180 - 8x = 2x

180 = 10x

x = 18