Respostas

2014-04-25T13:45:26-03:00
2x-4=-x+5
2x+x=5+4
3x=9
x=9/3
x=3
1 1 1
2014-04-25T13:46:29-03:00
2x - 4 = - x +5
2x + x = 5 + 4
3 x = 9
x = 9/3
x = 3