A, B, and C are collinear points: B is between A and C.  If AB = 36, BC = 5x - 9, and AC = 54, find x.

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
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A, B, and C are collinear points:

B is between A and C. 

If AB = 36, BC = 5x - 9, and AC = 54, find x.  

 I am doing the work myself and checking it against the experts. 
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