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Elementary College Geometry

Question 3 Page 7


[ATTACH=full]465[/ATTACH]


AB = BC


3(x - 15) = x + 3


3x - 45 = x + 3


3x - x = 3 + 45


2x = 48


(1/2)(2x) = (1/2)(48)


x = 24


AC = AB + BC


AC = 3(x - 15) + x + 3


Let x = 24


AC = 3(24 - 15) + 24 + 3


AC = 3(9) + 27


AC = 27 + 27


AC = 54


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