Answer:
=> equation 1
=> equation 2
=> equation 3
Step-by-step explanation:
Points P, Q, R, S, and T are collinear therefore, the following equations can be written based on the segment addition postulate:
=> equation 1
=> equation 2
=> equation 3
More equations can actually be written from the diagram given using the segment addition postulate. Such as:

The correct answer is 26 degrees.
The answers or your problem is x=6
To round it to the nearest unit it would be 38. To round it to the nearest ten it would be 40.