Răspunsuri

2014-09-07T16:40:38+03:00
X + y = - 1
x - y = - 2
adunam cele 2 ecuatii
2x  /  = - 3
x = - 3/2
-3/2 + y = - 1
y = 3/2 - 1
aducem la acelasi numitor
2y = 3 - 2
y = 1/2
Cel mai inteligent răspuns!
2014-09-07T16:42:18+03:00