Respostas

2014-02-05T18:13:48-02:00
3(6x-3) + 3(x+1)>3+x
18x -9 + 3x + 3 
> 3 + x
21x - 6 > 3 + x
21x - x > 3 + 6
  20x > 9
      x >
          20
2014-02-05T18:41:52-02:00
3(6x-3)+3(x+1)>3+x 

18x-9 +3x +3 > 3+x 

21x -6 > x+3 

20x -6 > 3 

20x > 9 

x > 9/20
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