[tex] \frac{ \frac{2(x- \frac{x}{3} )}{3} }{2} =4 \\ \\ \frac{2(x- \frac{x}{3} )}{3}=4*2 \\ \\ 2(x- \frac{x}{3} )=4*2*3 \\ \\ x- \frac{x}{3}= \frac{4*2*3}{2} \\ \\ \frac{3x-x}{3}= \frac{4*2*3}{2} \\ \\ 2x=\frac{4*2*3*3}{2} \\ \\ x=\frac{4*2*3*3}{2*2}=\frac{2*3*3}{1} = \boxed{18}[/tex]
