Răspunsuri

2014-04-20T19:36:34+03:00
X+y=3
x-y=1   prin adunarea celor 2 ecuatii obtinem
2x/=4
x=2    y=3-2=1
2014-04-20T19:40:21+03:00
X+y=3
x-y=1    se aduna primele doua
2x=4=>x=2
y=3-2=1