`#Sad`
`a)`
`|2x-4|+|x-3|`
`=` \(\left[ \begin{array}{l}2x-4+x-3\\-2x+4+x-3\\2x-4-x+3\\-2x+4-x+3\end{array} \right.\)
`=` \(\left[ \begin{array}{l}3x-7\\-x+1\\x-1\\-3x+7\end{array} \right.\)
`|x-5|+|x+6|`
`=` \(\left[ \begin{array}{l}x-5+x+6\\-x+5+x+6\\x-5-x-6\\-x+5-x-6\end{array} \right.\)
`=` \(\left[ \begin{array}{l}2x+1\\11\\-11\\-2x-1\end{array} \right.\)