`\text{~~Holi~~}`
`d. |x+1|+|x+2|=3x+5`
`-> |x+1|+|x+2|-3x=5`
`->`\(\left[ \begin{array}{l}x+1+x+2-2x=5, x+1\geq0, x+2\geq0 \\-(x+1)+x+2-3x=5, x+1<0, x+2\geq0\\x+1-(x+2)-3x=5, x+1\geq0, x+2<0\\-(x+1)-(x+2)-3x=5, x+1<0, x+2<0\end{array} \right.\)
`->`\(\left[ \begin{array}{l}x=-2 (ktm)\\x=-\frac{4}{3} (tm)\\x=-2 (ktm) \\x=-\frac{8}{5} (ktm)\end{array} \right.\)
`-> x=- 4/3`
`e. ||x-1|-1|=2`
`->`\(\left[ \begin{array}{l}|x-1|-1=2\\|x-1|-1=-2\end{array} \right.\)
`->`\(\left[ \begin{array}{l}x=4\\x=-2\\x∈∅\end{array} \right.\)
`->`\(\left[ \begin{array}{l}x=4\\x=-2\end{array} \right.\)
