Respostas

2013-11-23T16:53:21-02:00
6t+24=4t-48
6t-4t=-48-24
2t=-72
t=-36
2013-11-23T16:55:10-02:00
6(t+4)=4(T-12)
6t+24=4t-48
6T-4t=-48-24
2t=-72
T=72/2
t=-36