Answer:
X=115°
Explanation:
If you extend the line on the left up to the top, it forms a triangle. The three interior angles of that triangle are 50, 180-x, and 180-x.
50+180-x+180-x=180
410-2x=180
410-180=2x
230=2x
x=115°
Another way to look at it: Since two of the angles in the triangle are the same, they must total 130. (180-50=130)
130 ÷2 equals 65. If those angles are 65, x=180-65=115°