Answer: D. 140
Explanation:
Goal: Find x and solve the equation
1) Since they are parallel angles, you can move QXY up to SQR.
Note: I don't really know how to explain this... Hope this is enough.
2) Set up the equation and solve
4x+40+2x-10 = 180
6x+30=180
6x = 150
x = 25
3) Solve the PQS equation
4x+40
4(25)+40 (Substitute x here.)
100+40
140