Question

A pair of vertical angles has measures (3x+4)° and (7x-9)°
What is the value of x?

Answer 1

Since they are vertical they are equal to each other.

3x + 4 = 7x - 9
4 = 4x - 9
13 = 4x
3.25 = x

So the value of x is 3.25.

Hope this helps :)