5x-18 меньше 3(x+2) , 4x-8 больше 3x-12

[latex] \left \{ {{5x-18\ \textless \ 3x+6} \atop {4x-8\ \textgreater \ 3x-12}} \right. \\ \left \{ {{5x-3x\ \textless \ 6+18} \atop {4x-3x\ \textgreater \ -12+8}} \right. \\ \left \{ {{2x\ \textless \ 24} \atop {x\ \textgreater \ -4}} \right. \\ \left \{ {{x\ \textless \ 12} \atop {x\ \textgreater \ -4}} \right. [/latex] Получаем интервал: x∈(-4; 12)