SOLUTION: the length of a rectangle is 5 cm less than 3 times the width. the perimeter is 150 cm. find the length and width. How do I set this up?

Algebra ->  Rectangles -> SOLUTION: the length of a rectangle is 5 cm less than 3 times the width. the perimeter is 150 cm. find the length and width. How do I set this up?      Log On


   

Question 912892: the length of a rectangle is 5 cm less than 3 times the width. the perimeter is 150 cm. find the length and width.
How do I set this up?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

     .

2L + 2w = 150cm

0r

L + w = 75cm

(3w-5) + w = 75

4w = 80

w = 20cm  and L = 55cm 3%2A20-5

And...checking

L + w = 75cm