The perimeter of a rectangle is 20 ft. The width 8th 4 ft less than the length. Find the dimensions of the rectangle

Perimiter is 20ft

width is

what

do you mean the width is 8 feet less than the length? or 4ft less?

anyway

P=2 (L+W)

20=2 (L+W)

divide by 2

10=L+W

and

L=10-W

width is 4ft less than length (I assuming)

W=-4+L

repalce W with - 4+L

L=10 - (-4+L)

L=10+4-L

L=14-L

2L=14

L=7

W=-4+L

W=-4+7

W=3

it is 7ft by 3ft