Anybody want to help me with this math problem? Finding an angle measure for a triangle with an extended side.

Answer:
x = 130
Step-by-step explanation:
Angles in a triangle add up to 180:
57 + 73 = 130
180 - 130 = 50
Angles in a straight line add up to 180:
180 - 50 = 130
so x = 130