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if AB=CD, AB is 12-y, CD = 3x-4y, BD = 18, AC = x+y, what is x, y, and AC

  • geometry -

    No way to tell, unless ABCD is a parallelogram. In that case, AB=CD and AC=BD

    12-y = 3x-4y
    x+y = 18

    (x,y) = (11,7)

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