Answer:
These are alternate exterior angles
x=14
Explanation:
Alternate exterior angles are formed by two parallel and one transversal line.
I suggest you do some research on transversal angles. I think that would be really helpful in the near future :)
Alternate exterior angles are also equal
Knowing this, we now understand:
5x-9=3x+19
2x-9=19
2x=28
x=14
Hope this helps!