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?

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) (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 

And...checking

L + w = 75cm 

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