Odpowiedzi

2010-04-10T18:53:40+02:00
3²=2x-5
9=2x-5
9+5=2x
14=2x
x=7
2010-04-10T18:55:17+02:00
(2x-5)=2
2x-5=2/+5
2x=7/ :2
x=3.5