9514 1404 393
Answer:
x = 33
Explanation:
The angles of a linear pair are supplementary.
(2x -18)° +(4x)° = 180°
6x -18 = 180 . . . . . . . . divide by °, simplify
x -3 = 30 . . . . . . . . . divide by 6
x = 33 . . . . . . . . . . add 3
_____
Additional comment
The two angles are 48° and 132°.