136

$\left|6x+1\right|<3$
$-3<6x+1<3$
$-4<6x<2$

$-\frac{2}{3}<x<\frac{1}{3}$

$\left|5-12x\right|>9$
$5-12x>9$
$-12x>4$
$x<-\frac{1}{3}$
$5-12x<-9$
$-12x<-14$
$x>1\ \frac{1}{6}$
tai
$x<-\frac{1}{3}$

$\left|4x\right|\le2$
$4x\le2$
$x\le\frac{1}{2}$
$4x\ge-2$
$x\ge-\frac{1}{2}$
$-\frac{1}{2}\le x\le\frac{1}{2}$

$\left|-3x+7\right|\ge2$

$-3x+7\ge2$
$-3x\ge-5$
$x\le1\ \frac{2}{3}$
$-3x+7\le-2$
$-3x\le-9$
$x\ge3$

tai

$x\le1\ \frac{2}{3}$