Respuesta :

(x-3) + (x+5) = 180°

2x + 2 = 180° --> Subtract 2 from both sides

2x = 178° --> Divide both sides by 2

x = 89°

☆Proof your answer☆

(89 - 3) + (89 + 5) = 180

86 + 94 = 180 ✅