Respostas

2014-04-10T20:38:40-03:00
2014-04-10T20:41:39-03:00
8(x-1)=2x+4
8x - 8 = 2x + 4
8x - 2x = 4 + 8
6x = 12
x = 12
     -----
       6

x = 2
1 5 1