Question 762155
Opposite angles of a parallelogram are equal.
2x + 10 = 3x - 20
     -x = -30
       x = 30
So the opposite angles = 70 degrees.
In a parallelogram ABCD
A = C 
B = D Opposite angles
Also A + B
     D + C = 180 degrees
So, other opposite angles = 110 degrees