Question 754853
The two adjacent angles of a parallelogram = 180 degrees.
Therefore (3x - 4) + ( 3x + 16) = 180
              6x + 12 = 180
                    6x = 180 - 12
                    6x = 168
                     x = 168/6
                     x = 28 degrees
Therefore (3x - 4) = 80 degrees
          (3x + 16) = 100 degrees.
Hope this helps
:-)