If this is an equation, I'm assuming you meant to put "= 0" at the end of it. So, if you want to solve the equation, you now have 4/3x + 2 = 0. Subtract 2 from both sides.
After doing so, you get 4/3x = -2. In order to find x, you have to isolate it on the left side of the equation. To do this, divide both sides by 4/3. Your answer is the value for x.