Hello, Jerry99!

Did you make a sketch?

. .Code:: - - - 15 - - - : - *-----------------* - : | : : | x : | - *---------* - | - : | | | | : 12| | | |12-2x : | | | | : : | - *---------* - | - : | : : | x . *-----------------* - : x : 15-2x : x :

The room is 15 by 11 feet.

The border is feet wide.

The rug is by feet.

The area of the rug is 108 ft

There is our equation! . . .

This simplifies to: .

Hence: .

The width of the border is feet.