The perimeter of a room is 22m. if the length of the room is 6.5m, what is its width?

Let w be the width of the room.

The perimeter is given by the equation 2w + 2(6.5) = 22.
Combining like terms, we get 2w + 13 = 22.
Subtracting 13 from both sides, we get 2w = 9.
Dividing both sides by 2, we get w = 4.5.
The width of the room is 4.5 meters.