Odpowiedzi

2009-12-13T21:15:35+01:00
5x+2y / 5x-2y=4
5x+2y = 20x-8y
2y=15x-8y
y=5x
x=y / 5

5y+2x / 5y-2x=(5*5x+2y/5) / (5*5x-2y/5)=25x+0,4y / 25x-0,4y
2 3 2