geometry/algebra

I have tried to work this several ways and can not get the answer of 5

find x if the slope of a line passing through points A(4,3) and B(x,7)equals 4

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asked by Rose
  1. For line between the points (x2,y2) and (x,y1), the slope is
    m = (y2-y1)/(x2-x1) = (7-3)/(x-4) = 4

    Therefore 4x - 16 = 7 - 3 = 4
    4x = 20

    x = 5 is the correct answer

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    posted by drwls
  2. Yes!

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    posted by Angel
  3. -7n+4(-6+3n)

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