Odpowiedzi

2010-03-10T18:35:10+01:00
5p-3r=-6 |*2
3p-2r=2 |*-3

10p-6r=-12
-9p+6r=-6
------------
p=-18

5*-18-3r=-6
90-3r=-6
-3r=-6-90
-3r=-96
r=32

2010-03-10T18:36:29+01:00
{5p-3r=-6 / * -2 obustronnie
3p-2r=2 / * 3 obustronnie

-10p+6r=12
9p-6r=6

-p=18
p=-18
-2r=56
r=-28

p=-18
r=-28