This is fairly a simple problem. I know how you feel when you see the "<" sign. Do not worry, it is easier than you think.
First off, you need to simplify the equation, and by simplify, I mean that you need to isolate variables on 1 side of the equation and real numbers on the other side, it should look like this:
1/3x -6<4 => 1/3x< 4+6
1/3x < 10.
x < 30.
Now, to graph this is also simple. First, just treat this as x = 30. I assume that you should know to graph x =30. It is a vertical line that is perpendicular to the x-axis at the pt x=30. Then since the equation is
x<30, that simply means all point to the left of the line.
I hope this helps you.