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Points A, B, and C are collinear and point B lies in between points A and C. If AB = 3x + 1, BC = 15, and AC = 7x + 1, find AC. Show work please

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Answer:

AC = AB + BC + AC

AC= 3×+1+15+7×+1

AC= 3x+7×+1+15+1

AC=10×+17

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