Answer:
e = 10
Explanation:
According to the Vertical Angle Theorem, when two straight lines intersect, the opposite vertical angles are congruent.
Since the two given angles are vertical angles, they are congruent.
Therefore, we can set them equal to each other:


To solve for e, begin by subtracting 8e from both sides of the equation:


Add 8 to both sides of the equation:


Therefore, the value of e is 10.