the length of a rectangle is two times its width

Question

need help!

the length of a rectangle is two times its width. when the length is increased by 20cm and the width is decreased by 1cm, the area is 160cm^2. find the original lenth and width.

Answer 1

L=2W

(L+20)(W-1)=160  [remember length*width=area]

 

W=6

L=12

 

This is a basic question where you need to use the clues provided to form 2 formulas, and to substitute to find each variable.