Posted by Anonymous on .
The length of a rectangle is twice the width. The perimeter is 42cm. find the length of each side.

algebra 1 
bobpursley,
l=2W
P=2L+2W=2(2W)+2W
solve for W, and then solve for L 
algebra 1 
:) HI!,
2(2x)+2x=42
6x=42
x=7
width=7
length=14