\[tex]\left \{ {{y - x^{2} =3} \atop {x + y =5}} \right.\left \{ {{y = x^{2} + 3} \atop {x + (3 + x^{2}) =5}} \right. \left \{ {{y = x^{2} + 3} \atop {x^{2} + x - 2 = 0}} \right. x = 2 || x = -1\\\left \{ {{y = 4 + 3 = 7} \atop {x = 2}} \right. \\\left \{ {{y = -1 + 3 = 2} \atop {x = -1}} \right.[/tex]