Someone please help with this!! Will mark for brainliest!!!!!!!! Please please help!
                                             
                                          
                                          
                                        
											 
											Answer:
12
Step-by-step explanation:
1) AED and BEC are vertical angle, therefore they are equal.
AED = BEC = 90
2) 90 = 3x + 54
3x = 36
x = 12