Respuesta :
Answer:
11
Step-by-step explanation:
180 - 112 = 68
4x + 16 +5x - 3 + 68 = 180
simplify.
9x + 81 = 180. subtract 81 from 180
9x = 99. divide 99 by 9
x = 11.
To find x add the two interior angles together and put them equal to 112 (the exterior angle).
ANSWER: 109/9
ANSWER: 109/9