Answer:

Explanation:
We can find the angle directly above the 
.
We know that because they both lie on a straight line, the other angle is 
.
Aha! We have a path to the solution!
 because of the parallel line angle theorem(I forget what it's called).
We then add 
 and 
 to both sides to get 
.
Lastly, we divide by 
 to get 
.
So, 
 and we're done!