Odpowiedzi

2009-12-20T21:13:24+01:00
⅔ + ⅓ y+2⅓x -⅓y=
= ⅔ +2⅓x =
= 2/3 + 7/3 x
2009-12-20T21:12:37+01:00
2009-12-20T21:15:06+01:00