SOLUTION: the perimeter of a rectangle is 106 cm. If the length is 7 cm less than three times the width, what are the dimensions. I know P=2l+2w But I can not figure out how to write this pr

Question 912503: the perimeter of a rectangle is 106 cm. If the length is 7 cm less than three times the width, what are the dimensions. I know P=2l+2w But I can not figure out how to write this problem!
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi,

     .

2L + 2w = 106cm

0r

L + w = 53cm

(3w-7) + w = 53

4w = 60

w = 15cm  and L = 38cm 

And...checking

L + w = 53cm

 

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