\left \{ {{18x\geq36} \atop {x<6}} \right. <=> \left \{ {{x\geq2} \atop {x<6}} \right. " alt="\left \{ {{18x-36\geq0} \atop {x-3<3}} \right. <=> \left \{ {{18x\geq36} \atop {x<6}} \right. <=> \left \{ {{x\geq2} \atop {x<6}} \right. " align="absmiddle" class="latex-formula">
x∈[2; 6)