Respuesta :

alaayousof2020

Answer:

12x-63= 7x-8 ,,, 5x= 63-8=55 ,,, x=11

7x-8= 77-8=69

z= 180-69= 111

aniilsah555

Step-by-step explanation:

  • (12x-63°)=(7x-8)°
  • 12x°-63°=7x°-8°
  • 12x°-7x°=-8°+63°
  • 5x°=55°
  • x°=55°/5
  • x°=11°

  • (7x-8)°+z°=180°
  • 7x°-8°+z°=180°
  • 7×11°-8°+z°=180°
  • 77°-8°+z°=180°
  • 69°+z°=180°
  • z°=180°-69°
  • z°=111°