5< x-2/6 <6

Do you mean x - 2 divided by 6 or x -2/6

I think you probably mean (x-2/6

If that is correct, then multiply each part by 6 and then add 2 to each part.

That will leave x in the middle.

I call these the "sandwich problem" because x is sandwiched betweent the lower and upper numbers.