@Bơ
Đáp án+Giải thích các bước giải:
`a)|x-1,7|=2,3`
\(\left[ \begin{array}{l}x-1,7=2,3\\x-1,7=-2,3\end{array} \right.\)
\(\left[ \begin{array}{l}x=4\\x=-0,6\end{array} \right.\)
Vậy \(\left[ \begin{array}{l}x=4\\x=-0,6\end{array} \right.\)
`b) | x+3/4|-1/3=0`
`|x+3/4|=1/3`
\(\left[ \begin{array}{l}x+\dfrac{3}{4}=\frac{1}{3}\\x+\dfrac{3}{4}=\dfrac{-1}{3}\end{array} \right.\)
\(\left[ \begin{array}{l}x=\dfrac{-5}{12}\\x=\dfrac{-13}{12}\end{array} \right.\)
Vậy \(\left[ \begin{array}{l}x=\dfrac{-5}{12}\\x=\dfrac{-13}{12}\end{array} \right.\)
