9514 1404 393
Answer:
x = 53
Step-by-step explanation:
The two angles marked are parts of a right triangle. That means their sum is 90°:
(x -12)° +49° = 90°
x° +37° = 90° . . . . . . simplify
x° = 53° . . . . . . . . subtract 37°
x = 53 . . . . . . . . divide by °
