`2/3x-4x=5/6 `
`⇔(-10x)/3=5/6 `
`⇔-10x=15/6`
`⇔x=(-5)/20=(-1)/4`
`(1/3x+2).(3.lx+2l-1)=0`
`⇔(x/3+2)(3∣x+2∣-1)=0`
⇔\(\left[ \begin{array}{l}x/3+2=0\\x=-6\end{array} \right.\)
⇔\(\left[ \begin{array}{l}3∣x+2∣-1=0\\x=-7/3\end{array} \right.\)
⇔\(\left[ \begin{array}{l}3∣x+2∣-1=0\\x=-5/3\end{array} \right.\)