Answer:
[tex]\huge\boxed{x=9}[/tex]
Step-by-step explanation:
We know that ∠A and ∠B are the same exact length. Since one of the angles is given to us in an exact length, we can set the measures equal to each other.
[tex]4x + 9 = 45[/tex]
Let’s solve for x.
[tex]4x +9-9=45-9\\\\4x=36\\\\x=9[/tex]
Hope this helped!
