question: The rug is 5 feet wider than the chair. The couch is 2 feet longer than twice the width of the rug. If the chair is 3 feet wide. How many feet long is the couch?
answer: Chair = <<3=3>>3 feet
  Rug = 3 + 5 = <<3+5=8>>8 feet
  Couch = 2 * 8 + 2 = <<2*8+2=18>>18 feet
  The couch is <<18=18>>18 feet long.
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