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
