Respuesta :

Answer:

x=15 degrees

Step-by-step explanation:

from the img we can see that line CA is straight, meaning it is 180 degrees. Therefore, 4x+8x must equal 180

4x+8x=180, 12x=180, x=15

to check this we can insert 15 into the x's

8(15)+4(15)=180

and,

A+8x=180

60=A, 8x=120

120+60= 80