Hi,

The length of a rectangle is 7 yards less than 3 times its width

perimeter is 66 yards 



Let x represent the width, then length is (3x-7)

Question states******

 66yds = 2(3x-7) + 2x

Solving for x

  8x = 80

   x = 10yds, the width and the length is 23yds

CHECKING our Answer***

 46 + 20 = 66yds 

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