identify the segment bisector of XY Then find XY please prov

identify the segment bisector of XY. Then find XY. please provide steps.

i know the segment bisector is line n. I believe the answer should be 6.

Solution

What\' that , 5x+8?

If that n line is a bisector then,

5x+8 = 9x-12

4x=20,

x=5

XY = 5x+8+9x-12 = 13x-4 = 66

Please let me know how you arrive at 6