Question 398873
Ler x= original width
4x= original length


x+2 = new width
4x-10 = new length


2W + 2L = P
2(x+2) + 2(4x-10)=80
2x+4+8x-20=80
10x -16=80
10x = 96
x=9.6  original width

4x= 38.4 = original length


Check:  


New width = 9.6 + 2 = 11.6 inches
New lenth = 38.4-10 = 28.4 inches


Perimeter = 2*11.6 + 2*28.4=80 inches


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Dr, Robert J. Rapalje, Retired
Seminole State College of Florida