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05-02-2020
Mathematics

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points a b and c are collinear point b is between A and C solve for x AB = 3x BC = 2x -2 and AC =18

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jimthompson5910 jimthompson5910

05-02-2020

Answer: x = 4

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Work Shown:

AB + BC = AC .... see diagram below

(3x)+(2x-2) = 18 ... plug in given expressions

5x-2 = 18

5x-2+2 = 18+2 ... add 2 to both sides

5x = 20

5x/5 = 20/5 ... divide both sides by 5

x = 4

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