Your inequality looks like this:

To get rid of the /6, you need to multiply by 6 as the opposite operation cancels it out. So, all you need to do is multiply both sides by 6 to isolate x.
Therefore:
Your answer would be 15.6
So, difference as in subtract? so, if it is, it would be 15. if it means percent difference, it's about 60%.
The product of two negative numbers is positive is your answer