Đáp án:
Giải thích các bước giải:
`-7+|x-4|=-3`
`->|x-4|=-3+7`
`->|x-4|=4`
`->` \(\left[ \begin{array}{l}x-4=4\\x-4=-4\end{array} \right.\)
`->` \(\left[ \begin{array}{l}x=4+4\\x=-4+4\end{array} \right.\)
`->` \(\left[ \begin{array}{l}x=8\\x=0\end{array} \right.\)
`x-{57-[42+(-23-x)]}=13-{47+[25-(32-x)]}`
`->x-[57-(42-23-x)]=13-[47+(25-32+x)]`
`->x-(57-42+23+x)=13-(47+25-32+x)`
`->x-57+42-23-x=13-47-25+32-x`
`->x-x+x=13-47-25+32+57-42+23`
`->x=11`
