Respostas

2014-04-29T21:42:09-03:00
2x - 4 = -x +5?
2x + x = 5 + 4
3x = 9
x = 9 / 3
x = 3
1 5 1
2014-04-29T21:43:47-03:00
2x - 4 = -x + 5
2x + 1x = + 5 + 4
3x = 9
x = 9 / 3
x = 3