Question

Determine the measure of x and the exterior angle.

X =
Exterior Angle =
3x + 25°
20°
X + 550

Answer 1

x=65°

Explanation:

Since all exterior angles add up to 360°.

⇒(3x+25°) + (20°) + (x+55°) =360°

⇒4x+100°=360° {Add up like terms}

⇒4x=260° {Subtract 100 from both sides}

∴ x=65° {Isolate x (divide both sides by 4)}

I hope this helped you with your math problem but more especially with understanding how to solve.