Respostas

  • Usuário do Brainly
2014-08-21T23:27:54-03:00
 \frac{x+3}{3} =4

multiplica cruzado

x+3=12

x=12-3

x=9

S={9}
2014-08-21T23:30:54-03:00
A resposta correta será ( 9 )