Question

ajutooooooooooooor!! unul prin subtitutie unul reducere

Answer 1

-3x + y =3

2x +3y = -13

[-3x + y =3]×3

2x +3y = -13

-9x+3y=9 (1)

2x+3y= - 13 (2)

prin metoda reducerii

se scad cele 2 ecuatii (1) si (2)

-9x-2x +3y -3y =9 - (-13)

-11x=9+13

-11x=24

x= - 24/11

-3x + y =3⇒y= 3+3x

y=3(x+1)=3(1+24/11)=3(11+24)/11)=(3×35)/11=105/11

x= -24/11 si y =105/11