Giải thích các bước giải:
`a)|3x-2|<4`
`⇔` \(\left[ \begin{array}{l}|3x-2|<4\\2-3x<4\end{array} \right.\)
`⇔` \(\left[ \begin{array}{l}3x<6\\-3x<2\end{array} \right.\)
`⇔` \(\left[ \begin{array}{l}x<2\\x>\frac{2}{3} \end{array} \right.\)
`b)|3-2x|<x+1`
`⇔` \(\left[ \begin{array}{l}3-2x<x+1\\2x-3<x+1\end{array} \right.\)
`⇔` \(\left[ \begin{array}{l}-2x-x<1-3\\2x-x<1+3\end{array} \right.\)
`⇔` \(\left[ \begin{array}{l}-3x<-2\\x<4\end{array} \right.\)
`⇔` \(\left[ \begin{array}{l}x>\frac{2}{3}\\x<4 \end{array} \right.\)
