Question 1048133
<a href="https://www.youtube.com/watch?v=lM-Vkn9qMaI">Outside rectangular border - video</a>



-


w, uniform width of the uncapretted border of the room, this border being the outer part of the INSIDE of the room.
Make a drawing to see everything clearly.


Area of the carpet, {{{(19-2w)(33-2w)=275}}}.
When you understand this, then you know what to do to solve for w.


Review the video carefully.  The example is different, but the type of problem is the same.