If AABC = ADEC,
ZB = 40° and ZE = 2x + 4
A
B
с
E
x = [?]

Step-by-step explanation:
The angle at B is the same as the angle at E so equate them to each other to find x
2x+4=40°
2x=40-4
2x=36
x=36/2=18