Respuesta :

KurdishPotato

Answer:

x = 5

Step-by-step explanation:

The sum of interior angles in a triangle is 180°

91° + 10x - 4° + 8x + 3° = 180° add the like terms

90° + 18x = 180°

18x = 180° - 90

18x = 90° divide both sides by 18

x = 5