X = 33
The angles are corresponding, so they must be congruent. You set 4x-8 equal to 124 because they are congruent. You then add 8 on both sides and divide by 4 on both sides. You should get 33 for x.
Answer:

Step-by-step explanation:
Area of rectangle

Area of circle (semi-circle+semi-circle)


Add both areas

