Respostas

2014-09-02T21:45:15-03:00
-2 - 2/3.( 5/7 - 8/7)
-2 -2/3.(-3/7)
-2 - 2/3. -3/7
-2/1 -6/21
-42-6/21
48/21 Simplifica por 3
16/7
1 5 1