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Finding Perimeter of a Rectangle Given Clues on Length and Width

GRE-1W4GLW

A rectangle's width is four less than its length.

How would you express its perimeter in terms of its length, $L$?

A

$4L-8$

B

$L-4$

C

$2L-4$

D

${ L }^{ 2 }-4L$