For what value of x is the
quadrilateral a parallelogram?
2xº
(x + 30°)

Answer:
50°
Step-by-step explanation:
In a parallelogram, opposite angles are equal and all angles sum up to 360°.
So, 2x + 2x + x + 30 + x + 30 = 360
6x + 60 = 360
6x = 300
x = 50°
I think this is the answer.