Answer:
x = 12
Explanation:
The sum of the exterior angles of a convex polygon is 360°.
(5x +4)° +(4x +9)° +(9x -6)° +(4x +1)° +(7x +4)° = 360°
29x +12 = 360 . . . . . divide by °, collect terms
29x = 348 . . . . . . . subtract 12
x = 12 . . . . . . . . . divide by 29