Respuesta :

Answer:

12

Step-by-step explanation:

We know that ,

  • Sum of all exterior angles of a polygon = 360° .

So that ,

  • 5x+4 + 4x+9 + 9x-6 + 4x+1 + 7x+4 = 360
  • 29x +12 = 360
  • 29x = 348
  • x = 348/29
  • x = 12