Odpowiedzi

2010-04-07T23:55:17+02:00
(1/3) = (2/5 + 1/4 + x)/3
1 = 2/5 + 1/4 + x
1 = 13/20 + x
x = 7/20
1 5 1
2010-04-08T00:00:51+02:00