Respostas

2014-05-08T17:02:01-03:00
2014-05-08T17:04:46-03:00
 3(X-7)-2>0  

3(x-7) -2>0
3x -21 -2 >0
3x -23>0
3x>23
x>23/3

          23
       ------
           3
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1 5 1