Răspunsuri

2014-02-18T17:45:09+02:00
Inmultim prima cu 2

8x-6y=-2
5x+6y=4
--------------
13x=2
x=2/13

10/13+6y=4   amplif cu 13

10+78y=52
78y=42
y=42/72
y=21/36
y=7/13