Find the value of x
Please help and explain how you got it

9514 1404 393
Answer:
x = 55
Step-by-step explanation:
The marked angles are a linear pair, so total 180°.
75 + (2x -5) = 180
2x = 110 . . . . . . . . . . subtract 70
x = 55 . . . . . . . . divide by 2