Answer:
y=54
Step-by-step explanation:
I dont understand but here is a example how it may look like.
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The sum of exterior angles of a convex polygon is 360°.
.. 6x +(x +16) +(3x -1) +5x = 360
.. 15x +15 = 360 . . . . . . . . . . . . . . collect terms
.. x +1 = 24 . . . . . . . . . . . . . . . . . . divide by 15
.. x = 23