`2x+2=|3x-2|(x>=-1)`
`<=>`$\left[ \begin{array}{l}2x+2=3x-2\\2x+2=2-3x\end{array} \right.$
`<=>` $\left[ \begin{array}{l}x=4\\5x=0\end{array} \right.$
`<=>` $\left[ \begin{array}{l}x=4(tm)\\x=0(tm)\end{array} \right.$
Vậy `S={4,0}`
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