Odpowiedzi

2010-01-04T17:49:11+01:00
2010-01-04T18:05:26+01:00
Y----różnica

x-2+y=3
3+y=x+6

x+y=5
y-x=3

x=5-y
y-(5-y)=3

x=5-y
y-5+y=3

x=5-y
2y=8

x=5-y
y=4

x=1
y=4

-1;3;7