Respuesta :

Answer:

x = 20°

Step-by-step explanation:

We know,

The angle of a straight line is 180°

therefore,

  • 90 + (4x - 10) + x = 180°
  • 5x = 180 - 90 + 10
  • 5x = 190 - 90
  • 5x = 100
  • x = 20°

Hope it helps !!