the perimeter of rectangle is 78 cm and its length is 7 cm longer than its width. find the dimensions of the rectangle.

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the perimeter of rectangle is 78 cm and its length is 7 cm longer than its width. find the dimensions of the rectangle.

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Let x = width
x + 7 = length

2x + 2(x+7) = 78
2x + 2x + 14 = 78
4x + 14 = 78
4x + 14 - 14 = 78 - 14
   4x = 64
  4x ÷ 4 = 64 ÷ 4
x = 16 - length
  x + 7 = 23 - width

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