(0, 0) is a solution for the system because it is a solution to both inequalities. However, $\displaystyle{\left(-{3},-{1}\right)}\usepackage{cmbright}\Huge\$ is not a solution for the system, as it is a solution to only the first inequality. If you substitute $\displaystyle-{1}\usepackage{cmbright}\Huge\$ into the second inequality you get $\displaystyle-{1}>-{1}\usepackage{cmbright}\Huge\$ , which is false.