Answer:
x = 19
z = 102°
Explanation:
✔️5x - 17 = 78 (vertical angles area congruent)
5x - 17 + 17 = 78 + 17
5x = 95
5x/5 = 95/5
✔️78 + z = 180° (angles on a straight line).
78 + z - 78 = 180 - 78
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