Đáp án+Giải thích các bước giải:
`|2x - 4| = |5x + 3|`
`=>`\(\left[ \begin{array}{l}2x - 4=5x + 3\\2x - 4=-(5x + 3)\end{array} \right.\)
`<=>`\(\left[ \begin{array}{l}2x - 4=5x + 3\\2x - 4=-5x - 3\end{array} \right.\)
`<=>`\(\left[ \begin{array}{l}2x-5x = 3+4\\2x +5x= - 3+4\end{array} \right.\)
`<=>`\(\left[ \begin{array}{l}-3x = 7\\7x= 1\end{array} \right.\)
`<=>`\(\left[ \begin{array}{l}x = \dfrac{-7}{3}\\x= \dfrac{1}{7} \end{array} \right.\)
Vậy `x=-7/3` hoặc `x=1/7`
