Question

A rectangular room is three times as long as it is wide, and its perimeter is 48 meters. Find the length of the room.

Answer 1

y=6 x=18 i think that is the answer is 54.

Answer 2

x,y dimensions 
x=3y and perimeter equation is 2x+ 2y = 48
2*3y + 2y = 48
6y + 2y = 48
8y= 48

y= 6 and x = 18