Respostas

2014-08-04T18:00:02-03:00
2t + 1 = - 8
2t = - 8 - 1
2t = - 9
t = 
 \frac{-9}{2}
1 2 1
2014-08-04T18:01:01-03:00
2t+1=-8
2t=-8-1
2t=-9
t=-9/2
    
1 5 1