Answer:
x =39
Explanation:
First we will add all the angles together meaning 3x - 15 + 2x + 2x + 2x + 24 = 9x + 9 =360
We get 360 because a parallelogram = 360.
Next we subtract 9 on both sides which gives us
9x = 351
Next divide 9 by both sides and you get
x = 39.