${|3x-1|}$ - $\frac{1}{4}$ = $\frac{1}{2}$
${|3x-1|}$ = $\frac{1}{2}$ + $\frac{1}{4}$
${|3x-1|}$ = $\frac{3}{4}$
=> \(\left[ \begin{array}{l}3x-1=\frac{3}{4}\\3x-1=\frac{-3}{4}\end{array} \right.\)
=> \(\left[ \begin{array}{l}3x=\frac{7}{4}\\3x=\frac{-7}{4}\end{array} \right.\)
=> \(\left[ \begin{array}{l}x=3x=\frac{7}{12}\\x=3x=\frac{-7}{12}\end{array} \right.\)
Vậy \(\left[ \begin{array}{l}x=3x=\frac{7}{12}\\x=3x=\frac{-7}{12}\end{array} \right.\)
$\text{HỌC TỐT!}$
