Answer:
x = 16
Step-by-step explanation:
The two angles are vertical angles
Vertical angles are congruent
That being said we can create an equation
4x - 7 = 3x + 9
now we solve for x
step 1 add 7 to each side
9 + 7 = 16
-7 + 7 cancels out
now we have 4x = 3x + 16
step 2 subtract 3x from each side
4x - 3x = x
3x - 3x cancels out
we're left with x = 16
