The question makes little, if any sense.
There is no operator between 6x and 2.
Angles are usually identified by 3 characters, not 4 although that is irrelevant.
There is no indication of the measurement units for the angle: degrees or radians.
50 Degrees
6x + 2 = 6 6x = 4 x = 2/3
-6x = 12 x = -2
An algebraic expression
9x + 3 - 6x - 2 = 3x + 1