Hi,

     .

L + w = 11

(3w-4) + w = 11

4w = 15

w = 15/4  Or 3.75units and L = 7.25 

and...checking

sum = 11 

Answer by 100601(6)   (Show Source): You can put this solution on YOUR website!
 l= length in cm

w= width in cm




Keep in mind that you can substitute = for the word 'is' in word problems.

l=3w-4

Perimeter=2w+22

Perimeter=2l+2w




Substitute 2l+2w for the perimeter

2l+2w=2w+22

2l=22

l=11




Now find w by substitute 11 for l in the first equation.

11=3w-4

3w=15

w=5




Answer:

length- 11 cm

width- 5 cm

 

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