Answer:
x = 45°
Step-by-step explanation:
Angle 1 + Angle 3 = 180° Straight angle
Angle 1 + (2x + 15) = 180°
Angle 1 = 180° - (2x + 15)
Angle 1 = Angle 5 Corresponding angles
180° - 2x - 15 = 75°
180° - 15° - 75° = 2x
90° = 2x
Divide both sides by 2
x = 45°
