Hello and Good Morning/Afternoon!
Let's take this problem step by step:
Let's consider some facts:
⇒ angles are opposite each other
⇒ by the Vertical Angle Theorem
⇒ angles opposite each other are equal in measure
So:
[tex]\hookrightarrow 4x + 12 = 64[/tex]
Let's solve
[tex]4x + 12 = 64\\4x = 52\\x = 13[/tex]
x's value is 13
Answer: 13
Hope that helps!
#LearnwithBrainly
