Respostas

2013-10-22T17:52:32-02:00
Hola.

a) 9x+5>3x-7
9x-3x > -7-5
6x > -12
x > -12/6
x > -2                                     

b) 7x+2 <= 4(x-7)
7x + 2 <= 4x - 28
7x - 4x <= - 28-2
3x <= -30
x <= -30/3
x <= - 10