Odpowiedzi

2010-02-26T12:50:05+01:00
2h-3h+2b=2b-h
(2b+3h)-5=2b+3h-5
2010-02-26T12:52:10+01:00
2h-3h+2b=-h+2b
(2b+3h)-5=2b+3h-5
2010-02-26T12:52:17+01:00
2h - 3h + 2b = -h + 2b

(2b +3h) - 5= 2b + 3h - 5