Angle NOQ~ = Angle PQO NO=5x+12 , PQ=7x-8 find the length of NO for which NOPQ is a parallelogram
Solution:

Sides NO and PQ are opposite sides in the parallelogram, so they are equal:
NO=PQ5x+12=7x−82x=20x=10
Now we can substitute X in the equation of NO side:
NO=5x+12=5∗10+12=62
Answer: NO=62