Răspunsuri

2014-04-15T17:35:41+03:00
3x+y=-2/*3
-5x-3y=2

9x+3y=-6
-5x-3y=2
____________
4x=-4
x=-1

-3+y=-2
y=-2+3
y=1

VERIFICARE:
5-3=2 A
2 3 2
2014-04-15T17:35:46+03:00
O inmultim pe prima cu 3 si obtinem
9x+3y=-6
-5x-3y=2   prin adunarea celor 2 ecuatii obtinem
4x/=-4    x=-1

-3+y=-2
y=-2+3
y=1
2 5 2