Odpowiedzi

2010-01-11T14:54:20+01:00
X=-y
x-y=6

x=-y
-y-y=6

x=-y
-2y=6/-2

x=-y
y=-3

x=3
y=-3
2010-01-11T15:02:06+01:00

x=-y
x-y=6

x=-y
-y-y=6

x=-y
-2y=6/(-2)

x=-y
y=-3

x=3
y=-3
2010-01-11T18:50:16+01:00
X=-y
x-y=6

x=-6
-y-y=6

x=-y
-2y=6/-2

x=-y
y=-3

x=3
y=-3