69. Suppose the length of each side of a square is decreased by 4 feet. If the perimeter of the square is now 32 feet,
what was the original length of each side?


  1. Answer:
    4 feet
    Step-by-step explanation:
    Let x be the length of the side of the square, in feet.  The new square has sides that are (x – 4) feet,
    The perimeter of the new square would be 4(x – 4) feet.  We are told this new perimeter is 32 feet, so we can write:
      4(x – 4) = 32 feet
      4x – 16 = 32 feet
    4x = 48 feet
     x = 12 feet
    The original sides were 4 feet each.


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