Respuesta :

thebecks

Answer:

x = 42°

Step-by-step explanation:

Fact: The sum of the exterior angles will be 360°.

(3x + 45) + (2x - 30) + (5x - 75) = 360

combine like terms:

10x - 60 = 360

add 60 to each side of the equation:

10x = 420

divide both sides by 10:

x = 42°