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Rezolvati sistemul de ecuatii prin metoda reducerii
[tex] \left \{ {{3x+y=-2} \atop {-5x-3y=2}} \right. [/tex]


Răspuns :

3x+y= -2 | ·(-3)
-5x-3y=2 

-9x-3y= 6
-5x-3y=2 (scadem cele doua relatii)

⇒ -4x = 4⇒ x= -1

-3+y= -2⇒ y= 1