You may have thought that $\displaystyle{\left({5},-{3}\right)}\usepackage{cmbright}\Huge\$ was a solution to this inequality because you ended up with 6 on each side of the inequality symbol. However, $\displaystyle{6}<{6}\usepackage{cmbright}\Huge\$ is a false statement, so $\displaystyle{\left({5},-{3}\right)}\usepackage{cmbright}\Huge\$ is not a solution to the inequality.