Step-by-step explanation:
We can clearly see that:-
EAD is a straight line.
So, we can say that the total value of angle they will make is 180°.
Now, if I form the equation, it will be:-
[tex]100 + x + 20 = 180[/tex]
[tex]120 + x = 180[/tex]
[tex]x = 180 - 120[/tex]
[tex] \boxed{ \boxed{x = 60 ^ \circ}}[/tex]
is the answer
Hope it helps :D
