SOLUTION: the length of a rectangle is 7 meters shorter than twice the width. the perimeter is 64 meters. set up and solve. please help! i don't understand!

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Question 838308: the length of a rectangle is 7 meters shorter than twice the width. the perimeter is 64 meters. set up and solve.
please help! i don't understand!
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

the length of a rectangle is 7 meters shorter than twice the width highlight_green%28x%29. length is highlight_green%282x-7%29.  

the perimeter is 64 meters.



  2x + 2(2x-7) = 64m  ****

    6x = 78m

     x = 13m, the width.  The length is 19m

CHECKING our answer***

  2*13m + 2*19m = 26m + 38m = 64m