The perimeter of a rectangle plot of land is 800 feet. The length is 20 feet less than twice the width. What is the length and width of the lot?

Question

anonymous · Answer

assume that the width is x.
2(x)+2(2x-20)= 800
6x=840
x=140

lastly,
width=x=140 feet
length= 2x-20=260 feet

correct me if im wrong

anonymous · Answer

that looks similar to what my teacher did in class im just not getting it

anonymous · Answer

how did you get 840?

anonymous · Answer

2(x)+2(2x-20)= 800
6x-40=800
6x=840
x=140

anonymous · Answer

your combining like terms?

anonymous · Answer

yes. it would be easier if you draw a rectangle and mark each side with each function stated above.