Anybody help? Really hard :/

Answer:
24°
Step-by-step explanation: a flat surface=180° 180-156=24
Answer:
24 °
Step-by-step explanation:
Supplementary angles are two angles that add up to 180°
One angle is 156 so 180-156 gives you the angle of the missing angle. The answer of 180-156 is 24 so therefore, x=24°
(Please mark brainliest)