Đáp án:
Giải thích các bước giải:
1|x|-x=3/4
=>|x|=3/4+x
=>\(\left[ \begin{array}{l}x=3/4+x\\x=-3/4-x\end{array} \right.\)
=>\(\left[ \begin{array}{l}0=3/4(VL)\\2x=-3/4\end{array} \right.\)
=> x=-3/8
2|x-2|=x
=>\(\left[ \begin{array}{l}x-2=x\\x-2=-x\end{array} \right.\)
=>\(\left[ \begin{array}{l}0=2(VL)\\2x=2\end{array} \right.\)
=>x=1
3|x+2|=x
=>\(\left[ \begin{array}{l}x+2=x\\x+2=-x\end{array} \right.\)
=>\(\left[ \begin{array}{l}0=-2(VL)\\2x=-2\end{array} \right.\)
=>x=-1
