Odpowiedzi

2010-02-10T19:56:09+01:00
A+(-5)+5b+6a=
a-5+5b+6a =
7a + 5b - 5


7d+(-5)+(-d)+7-(-3)=
7d-5-d+7+3=
6d + 5
2010-02-10T20:15:05+01:00
A+(-5)+5b+6a=7a+(-5)+5b

7d+(-5)+(-d)+7-(-3)= 6d+5