Odpowiedzi

2010-02-10T15:50:49+01:00
2(3a+1)+2(a-b)=6a+2+2a-2b=8a-2b+2
1 5 1
2010-02-10T15:52:10+01:00
2(3a+1)+2(a-b)
6a+2+2a-2b
8a+2-2b
1 5 1