Odpowiedzi

2009-11-29T21:39:48+01:00
2009-11-29T21:40:50+01:00
3(2x-1)=21
6x-3=21 /+3
6x=24 /:6
x=4
2009-11-29T21:42:00+01:00
3(2x-1)=21
6x - 3 = 21
6x= 21 + 3
6x=24 |:6
x=4