X=
Help me please! Thanks so much

In the given diagram, the value of x is 15
From the question, we are to determine the value of x
From one of the circle theorems, we have that
Opposite angles of a cyclic quadrilateral are supplementary.
Thus, in the diagram
5x + 7x = 180°
12x = 180°
x = 180°/12
x = 15
Hence, the value of x is 15
Learn more on Circle Geometry here: https://brainly.com/question/27884509
#SPJ1