Question 990589
if width w=x----(1)
and lenght L=2x----(2)
Then 
perimeter(P)=2(L+w)---(3)
put equ 1 and 2 in 3
Therefore,
p=2(x+2x)
p=2(3x)
p=6x
HOPE THIS HELPS?
;;Timnewman::