Odpowiedzi

2010-03-04T21:46:30+01:00
6c.3/5 - 4c.1/3-2c.7/30 = 6c.18/30 - 4c.10/30 - 2c.7/30 = 1/30

2całe 3/7 - 4c. 3/9 - 1c.12/14= 2c.54/126 - 4c.42/126 - 1c.108/126 = -237/63 = -79/21 = -3c.16/21