Need the answer with all work. Thanks (open the question to see the picture)

9514 1404 393
Answer:
27
Step-by-step explanation:
Adjacent angles in a parallelogram are supplementary.
(5z -6) +(2z -3) = 180
7z = 189 . . . . . . . . . . . . . collect terms, add 9
z = 27 . . . . . . . divide by 7