The following table shows the length and width of two rectangles: length width rectangle a 2x + 8 x − 1 rectangle b 3x + 5 2x − 2 which expression is the result of the perimeter of rectangle b minus the perimeter of rectangle a?

Rectangle of perimeter A=2(2x+8+x-1)
                                      =2(3x+7)
                                      =6x+14equation 1
rectangle of perimeter B=2(3x+5+2x-2)
                                      =2(5x+3)
                                      =10x+6equation 2
now,eq 2-eq 1
      =10x+6-(6x+14)
      =10x+6-6x-14
      =4x-8
      =4(x-2)
 

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