While it is true that $\displaystyle{\left(-{2},{2}\right)}\usepackage{cmbright}\Huge\$ is not a solution to the system, it is actually not a solution to either of these equations. You may have switched the values of x and y when substituting into the first equation. Make sure that you substitute $\displaystyle-{2}\usepackage{cmbright}\Huge\$ for x and 2 for y.