Respostas

2013-10-24T13:25:26-02:00
X + x/2 = 120
3x/2 = 120
3x = 240
x = 240/3
x = 80
1 5 1
2013-10-24T13:31:34-02:00
X+x/2=120
2x/2 + x/2=120.2/2
2x+x = 120.2
3x=240
x=80