please help me on number 3

Answer:
D
Step-by-step explanation:
Well the total angle is of measure 8x+2 and
the bisected angle is of 5x-3 so that means
(8x+16)/2=5x-3
4x+8=5x-3
x=11°
so 5(11)-3=52° this is because the bisected angles are the same
BED=REB