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Rezolva prin metoda substitutiei:

5x+y=-11
2x+3y=-7


Răspuns :

Răspuns:

{y=-11-5x {y=-11-5x {y=-11-5x

{2x+3(-11-5x)=-7 {2x-33-15x=-7 {2x-15x=-7+33

{y=-11-5x {y=-11-5x {y=-11-5×-2 {y=-11+10=-1

{-13x=26 {x=-2 {x=-2 {x=-2