Answer:
10
Step-by-step explanation:
Since B corresponds to E, the two angles are equal
50 = 5x
x = 10°
x= 10
Since the triangles are congruent
<B = <E
Divide each side by 5
50/5 = 5x/5
10 =x
4.5 i believe correct me if i'm wrong
x = 3
The answer is the second one, <em>2.</em>