Respuesta :

Answer:

x = 12

Explanation:

3x + 54 = 90

3x = 36

x = 12

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

ACCESS MORE
ACCESS MORE
ACCESS MORE
ACCESS MORE