Răspuns:
[tex]\left \{ {{-x+y=-3} \atop {x+2y=-3}} \right.[/tex] <=> [tex]\left \{ {{x=y+3} \atop {x+2y=-3}} \right.[/tex] <=> [tex]\left \{ {{x=y+3} \atop {y+3+2y=-3}} \right.[/tex] <=> [tex]\left \{ {{x=y+3} \atop {3y+3=-3}} \right.[/tex] <=> [tex]\left \{ {{x=y+3} \atop {3y=-6}} \right.[/tex] <=> [tex]\left \{ {{x=y+3} \atop {y=-2}} \right.[/tex] <=> [tex]\left \{ {{x=-2+3} \atop {y=-2}} \right.[/tex] <=> [tex]\left \{ {{x=1} \atop {y=-2}} \right.[/tex]
Asemanator este si b-ul. Good luck! :D
