Is x-6 over 6-x the same thing
No. x-6 is the variable's value 'x' minus six whereas 6-x is just six minus x's value
No, I'll show you how:
Let's say x=55-6 is -1 but 6-5 is JUST 1
So, they may look the same, but because it is subtraction, they cannot be the same.