Respostas

  • Usuário do Brainly
2014-08-28T15:38:04-03:00
(1 , x , 9)x = (1 + 9)/2x = 10/2
x = 5
b) (10, x , 6)
x = (10 +6)/2
x = 16/2
x = 8
1 3 1