y = 27
z = 111
For y:
Since N is parallel to M, the angles 69° and 6y-93 are congruent.
Set 6y - 93 = 69
+ 93 +93
6y = 162
y = 27
For Z:
A ray will always equal 180° so combine:
6y - 93 + z = 180
since you already have y, plug it in to get
162 - 93 + z = 180
69 + z = 180
-69 -69
z = 111
