Respostas

2013-12-12T15:29:32-02:00
2x+3(x-1)=12
2x+3x-3=12
5x=12+3
5x=15
x=15/5
x=3
2 4 2
2013-12-12T15:29:43-02:00
2x+3x-3=12
5x = 12+3
X = 15/5
 = 3

1 5 1