Answer:
y = 54
Step-by-step explanation:
180 - 74 = 108 (this is the sum of 2 unknown angles)
108/2 = 54 ( This is the measure of each y angle)
Hope this helps!
the answer is 54
y+y+72=180
2y+72=180
2y=180-72
2y=108
y=108/72
y=54
hope it helps
