SOLUTION: Need to find the dimension of a rectangle with a perimeter of 640yds. All I have is one side is w and the other is 3w-12. 3w has me confused. Thanks.

Question 562778: Need to find the dimension of a rectangle with a perimeter of 640yds. All I have is one side is w and the other is 3w-12. 3w has me confused. Thanks.

Found 2 solutions by rfer, mananth:
Answer by rfer(16322) (Show Source): You can put this solution on YOUR website!
2w+2(3w-12)=640
2w+6w-24=640
8w=640+24
8w=684
w=684/8
w=85.5
L=(3w-12)=3*85.5-12
L=244.5
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
Perimeter = 2*(L+W)
640= 2*(W+3W-12))
640=2(4W-12)
640=8W-24
8W=664
/8
W=83 yards one side
other side = 3w-12
3*83-12
249-12
237 yards
219+77=326
RELATED QUESTIONS
One side of a rectangle is 3 inches shorter than the other side, and the perimeter is 54... (answered by actuary)
I am having issues with this one problem in my home work. I don't know why I cant get... (answered by ankor@dixie-net.com)
The length of a rectangle is 50ft. The perimeter of the rectangle is 275ft more than the... (answered by checkley71)
A square is given with sides, s. In a rectangle, one dimension is two more than s and the (answered by addingup)
the perimeter of a rectangle is 58 meters. one side is 3 meters longer than the other... (answered by Earlsdon,solver91311)
I have a rectangle with a perimeter equal to 16cm. I have to determine the value of x.... (answered by ankor@dixie-net.com)
What is the perimeter of a rectangle with one side that's measurement is 45.5 and the... (answered by stanbon)
Find the dimension of the rectangle if one of its sides are three times as long as the... (answered by lwsshak3)
If one dimension of a square is increased by 3cm and the other dimension is decreased by... (answered by richwmiller)