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Rezolvati sistemul de ecuatii prin metoda reducerii

Rezolvati Sistemul De Ecuatii Prin Metoda Reducerii class=

Răspuns :

-6y+3=2x+2
2y+3x=4

Inmultim a doua ec. cu 3:

-6y+3=2x+2
6y+9x=12

 Adunam ecuatiile:

0+3+9x=2x+2+12

7x=11

x=11/7

2y+3x=4
2y+3*11/7=4

y=-5/14