Answer:
Vertical angles
x =37
Explanation:
Adjacent angles are next to each other and share one side
Vertical angles are across from each other and only share a vertex.
These angles are vertical angles. Vertical angles are equal
3x-4 = 107
Add 4 to each side
3x-4 +4 =107+4
3x = 111
Divide by 3
3x/3 = 111/3
x=37