Respostas

  • Usuário do Brainly
2013-11-29T12:44:48-02:00
 - 5x - 7 - 2x - 2 = 0
- 5x - 2x = 0 + 7 + 2
- 7x = 9
x = 9 : (- 7)
x = - 9/7
2 5 2
2013-11-29T12:46:41-02:00
-5x-7-2x-2=0
-7x-7-2=0
-7x=-9
x=9/7