Help me with this problem? Please? Finding an angle measure given extended triangles.

Answer:
x = 51
58 and 71
Step-by-step explanation:
109 + x = 180
Subtract 109 from both sides
x = 71
Since it's opposite angles 58 = 58
71 + 58 + x = 180
129 + x = 180
Subtract 129 from both sides
x = 51