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posted by Charlie on Tuesday, September 11, 2012 at 8:30pm.

B is between A and C. Solve for x, if AB=2x+6, BC=4x-3, and AC=5x+12

you know that AB+BC = AC so, plug in the values: 2x+6 + 4x-3 = 5x+12 6x+3 = 5x+12 x = 9

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