`|3x-1|-1/4=1/2`
`⇒ |3x-1|=1/2+1/4`
`⇒ |3x-1|=3/4`
`⇒` \(\left[ \begin{array}{l}3x-1=\dfrac{3}4\\3x-1=-\dfrac{3}4\end{array} \right.\)
`⇒` \(\left[ \begin{array}{l}3x=\dfrac{3}4+1\\3x=-\dfrac{3}4+1\end{array} \right.\)
`⇒` \(\left[ \begin{array}{l}3x=\dfrac{7}4\\3x=-\dfrac{1}4\end{array} \right.\)
`⇒` \(\left[ \begin{array}{l}x=\dfrac{7}4÷3\\x=-\dfrac{1}4÷3\end{array} \right.\)
`⇒` \(\left[ \begin{array}{l}x=\dfrac{7}{12}\\x=\dfrac{1}{12}\end{array} \right.\)
Vậy `x={7/12;1/12}`
Xin hay nhất !
