The second equation can be rewritten as $\displaystyle{y}=-{x}-{2}\usepackage{cmbright}\Huge\$ . These two equations are shown in the graph, so this is the correct system. However, the solution to the system is the point of intersection, and that point is not $\displaystyle{\left({5},-{3}\right)}\usepackage{cmbright}\Huge\$ . Always check your solution in the original equations.