Respostas

  • Usuário do Brainly
2014-08-01T14:27:31-03:00
2y-y-10y = - 9y
4a-a-7a = - 4a
2014-08-01T14:38:00-03:00
2y-y-10y=11y-2y=9y
4a-a-7a=8a-4a=4a