|3x|−6<0|3x|<6−6<|3x|<6−6<3x/:3x>−23x<6x<2−2<x<2{\displaystyle {\begin{aligned}&|3x|-6<0\\&|3x|<6\\&-6<|3x|<6\\&\color {blue}-6<3x/:3\\&\color {blue}x>-2\\&\color {red}3x<6\\&\color {red}x<2\\&\color {Violet}-2<x<2\\\end{aligned}}}