Answer:
x= 11°
Step-by-step explanation:
∠BEF= 180° -4x (adj. ∠s on a str. line)
∠BFE
= 180° -147° (adj. ∠s on a str. line)
= 33°
∠BEF +∠BFE +∠EBF= 180° (∠ sum of triangle)
180° -4x +33° +x= 180°
-4x +x= 180° -180° -33°
-3x= -33°
3x= 33°
Divide both sides by 3:
x= 33° ÷3
x= 11°
