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Hi
two longest sides are five less than three times the width
Let x and (3x-5) represent the width and length respectively
Question states
 (3x-5) + x + x = 410 ft    |using the henhouse as a length of the fence
solving for x 
      5x = 415 ft
       x = 83 ft, the width.  the length is 244ft ( 3*83-5)
CHECKING our Answer
  244 + 83 + 83 = 410