Respostas

2014-05-05T21:30:01-03:00
-3x (8)=
-3x= -8 (-1)
3x=8
x=8/3
x=2,66
2014-05-05T21:35:28-03:00
-3x (+9 - 1)
-3x = -8 (-1)
3x = 8
x= 8/3 ou 2,66