Vertical angles are congruent and have equal measures. Therefore, x + 16 = 4x -5. Simplify and solve for x : 16 + 5 = 4x - x 21 = 3x =================> x = 21/3 = 7. Thus the angles measure is x+16 = 7+16 = 23 degrees, for both angles (for each of the two vertical angles). ANSWER