Respuesta :

henryhuangbc

Answer:

Hey there,

Let the angle ABC = x

Let the angle CBE = y

Let the angle EBD = z

We want to find x.

So, we are given the following:

x+y+z=85

z=21

And y=z

therefore, both y and z must equal 21.

21+21=42

85-42=43.