`-4x-6=|2x+4|(x<=-2/3)`
`<=>` $\left[ \begin{array}{l}2x+4=4x+6\\2x+4=-6-3x\end{array} \right.$
`<=>` $\left[ \begin{array}{l}2x=-2\\5x=-10\end{array} \right.$
`<=>` $\left[ \begin{array}{l}x=-1\\x=-2(tm)\end{array} \right.$
Vậy `S={-1,-2}`
`-4x-6=|2x+4|(x<=-2/3)`
`<=>` $\left[ \begin{array}{l}2x+4=4x+6\\2x+4=-6-4x\end{array} \right.$
`<=>` $\left[ \begin{array}{l}2x=-2\\6x=-10\end{array} \right.$
`<=>` $\left[ \begin{array}{l}x=-1\\x=-5/3(tm)\end{array} \right.$
Vậy `S={-1,-5/3}`