Twice The Difference Between Four Time A Number And Five Is Six. Can You Find The Number?

2(4n-5) = 6
4n-5 = 3    (divide both sides by 2)
4n = 8    (add 5 to both sides)
n=2    (divide both sides by 4)

Or
2(5-4n) = 6
5-4n = 3    (divide both sides by 2)
-4n = -2    (subtract 5 from both sides)
n = 1/2    (divide both sides by -4)

It depends on what you mean by "the difference between __ and __".