Respostas

2013-09-17T09:37:54-03:00
7(x+2) - 18 < 3x
7x + 14 - 18 < 3x 
7x - 3x < 18 - 14
4x < 4
x < 1
2013-09-17T09:54:58-03:00
7(x+2) - 18 < 3x
7x + 14 - 18 < 3x 
7x - 3x < 18 - 14
4x < 4
x < 1
1 1 1