You may have correctly divided both sides of the inequality by $\displaystyle-{2}\usepackage{cmbright}\Huge\$ to get $\displaystyle{\left|{n}+{6}\right|}<-{2}\usepackage{cmbright}\Huge\$ , but then you may have tried to rewrite this as $\displaystyle{2}<{n}+{6}<-{2}\usepackage{cmbright}\Huge\$ . However, none of this makes sense, because an absolute value cannot be negative.