Question

rezolva urmatoarele sisteme de ecuatii prin metoda substitutiei​

Answer 1

Răspuns:

$\left \{ {{-x+y=-3} \atop {x+2y=-3}} \right.$  <=>  $\left \{ {{x=y+3} \atop {x+2y=-3}} \right.$  <=>  $\left \{ {{x=y+3} \atop {y+3+2y=-3}} \right.$ <=> $\left \{ {{x=y+3} \atop {3y+3=-3}} \right.$  <=> $\left \{ {{x=y+3} \atop {3y=-6}} \right.$  <=> $\left \{ {{x=y+3} \atop {y=-2}} \right.$ <=> $\left \{ {{x=-2+3} \atop {y=-2}} \right.$ <=>  $\left \{ {{x=1} \atop {y=-2}} \right.$

Asemanator este si b-ul. Good luck! :D