Well first, let's just see how we can simplify the expression we are given. After all, we are trying to find a simple expression equal to this one.
[tex]2(3x - 1) - 3x + 4[/tex]
[tex]6x - 2 - 3x + 4[/tex]
[tex]3x + 2[/tex]
In this case, we can see that we have simplified our expression down to 3x + 2.
It is fair to say that there are no simpler expressions, simply due to the fact that we must have a term with an [tex]x[/tex], along with a constant.