Răspuns:
Explicație pas cu pas:
Metoda reducerii
2x+3y=-3 2x+3y=-3
-x+2y=-5 (2) -2x+4y=-10
..................
7y=-13 y=-13/7
x=2y+5=-26/7+5=(-26+35)/7=9/7
Metoda substitutiei
2x+3y=-3
-x+2y=-5 x=5+2y 2(5+2y)+3y=-3 10+4y+3y=-3 7y=-13 y=-13/7
x=5-2×13/7=(35-26)/7=9/7
