You can't make a negative cut here. Somehow we would have to add cardboard or something there. So we know that x is going to be greater than or equal to zero. So let me write this down. x is going to be greater than or equal to zero. And what does it have to be less than? Well, I can cut at most, we can see here the length right over here, this pink color, this mauve color, is 20 minus two x.