Respuesta :
Three times a number (w) is less than 18.
I would personally write it 3w<18.
You may be looking for 3 x w-18 or 3w-18 or possibly 3*w-18
I would personally write it 3w<18.
You may be looking for 3 x w-18 or 3w-18 or possibly 3*w-18