Hi,

The length of a rectangle is 13 centimeters less than three times its width.

Let x represent the width and (3x-13) the length



Question states***Its area is 56 square centimeters.

  A = 

Solving for x

  3x^2 - 13x - 56 =0



  

  

  x = 7   0r  x = -16/6 (tossing out negative solution for unit measure)

Width is 7cm  and length is 8cm   (3x-13)    

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