Hi,

the length of a rectangle is 4 centimeters less than three times its width. 

If the area is 55 square centimeters, find the length and width 

   x(3x-4) = 55

   3x^2 - 4x - 55 = 0

 (3x + 11)(x-5) = 0

          x = 5, throwing out the negative solution for unit of measure

 width is 5 and length is 11    

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