Respostas

2014-05-06T19:37:10-03:00
2) 3x - 27 = 0
3x = 27
x = 27 / 3
x = 9

3) 4x - 64 = 0
4x = 64
x = 64 / 4
x = 16
1) 2x - 50 = 0 => 2x=50 => x=50/2 => x=25
2014-05-06T19:37:56-03:00