You may have ignored the negative signs in the ordered pair. This ordered pair is not a solution to the equation $\displaystyle{x}+{y}={5}\usepackage{cmbright}\Huge\$ because $\displaystyle{\left(-{3}\right)}+{\left(-{2}\right)}={5}\usepackage{cmbright}\Huge\$ , or $\displaystyle-{5}={5}\usepackage{cmbright}\Huge\$ , is not a true statement.