Respostas

2013-11-27T17:48:38-02:00
5a-6=2(a+9)
5a-6=2a+18
5a-2a=18+6
3a=24
a=24/3
a=8
  • Usuário do Brainly
2013-11-27T17:49:22-02:00
5a - 6 = 2.(a + 9)
5a - 6 = 2a + 18
5a - 2a = 18 + 6
3a = 24
a = 24/3
a = 8