Answer:
x = 55.7
Explanation:
the angle vertically opposite (2x - 3)° is congruent
Then
(2x - 3)° and (x + 15.9)° are same- side interior angles and sum to 180°, so
2x - 3 + x + 15.9 = 180
3x + 12.9 = 180 ( subtract 12.9 from both sides )
3x = 167.1 ( divide both sides by 3 )
x = 55.7