Question

rezolvati sistemele de exuatii prin metoda reducerii​

Answer 1

$\left \{ {{4x+2y=-2} \atop {2x+3y=9|*(-2)}} \right. <=>\left \{ {{4x+2y=-2} \atop {-4x-6y=-18}} \right.$

-4y=-20 |*(-1)

4y=20

y=5

4x+2y=-2=>4x+2*5=-2=>4x+10=-2=>4x=-12=>x=-3