The measure of angle x is 55 I found this by finding angle BPR.
Then I found that we start with 180 - 120 and that equals 60. That means that angle BPR is 60 degrees. Then we need to do 65 + 60 + x =180. To find the x we do 65 + 60 and that gives us 125. After simplifying that from simple algebra we get x=55