I propose this solution, in the castle of math it just means switching a couple of different special cases, nothing more.
But it certainly makes more sense. You are multiplying or dividing by a non quantity, thus you are not performing the operation and your X remains the same. Simple as pie.
Another example of math confusion is including 2 in the prime number sequence. It's a mistake performed only to abide to preexisting dogmas. 2 is clearly an even number, the correct sequence is 1,2,3,5... etc. /end rant