x-10=-90 2x-100=-60 |x-100|=1000 |x-1|+4=13

`x-10=-90`

`→x=-90+10`

`→x=-80`

Vậy `x=-80`

 `2x-100=-60`

`→2x=-60+100`

`→2x=40`

`→x=20`

Vậy `x=20`

`|x-100|=1000`

`→` \(\left[ \begin{array}{l}x-100=1000\\x-100=-1000\end{array} \right.\) 

`→` \(\left[ \begin{array}{l}x=1100\\x=-900\end{array} \right.\) 

Vậy `x∈{1100;-900}`

`|x-1|+4=13`

`→|x-1|=9`

`→` \(\left[ \begin{array}{l}x-1=9\\x-1=-9\end{array} \right.\) 

`→` \(\left[ \begin{array}{l}x=10\\x=-8\end{array} \right.\) 

 Vậy `x∈{10;-8}`