Answer: The value of x = 5
Explanation:
Given : ∠E and ∠F are vertical angles m∠E = 8x + 8 and m∠F = 2x + 38.
We know that the vertical angles are congruent.
It means



Subtract 2x and 8 from both sides , we get

Divide both sides by 6 , we get

Hence, the value of x = 5