Answer:
x = 120°
Explanation:
Since it is a triangle we know that there are three angles that add up to 180° for a triangle.
Two angle which are the same is consider an isosocles triangle.
The third angle should add up to 180 with the two same angle.
Thus,
x + 30° + 30° = 180°
x + 60° = 180°
x = 180° - 60°
x = 120°