Odpowiedzi

2009-12-13T19:18:10+01:00
3x + 2 = 2
3x = 2-2
3x = 0 / :3
x= 0



x -2 < 1
x< 2+1
x < 3
2009-12-13T19:18:25+01:00
|2x+2|+|x|=2
2x+2+x=2
3x=0 |:3
x=0
|x-3|-|2x+1|<_1
x+3-2x-1<_1
-x<_-1 |:-1
x_>1