Réponses

  • Utilisateur Brainly
2014-10-26T11:30:53+01:00
A= 6 / 7 - 4 / 7 x 5 / 2
A= (6 x 2) / (7 x 2) - (4 x 5) / (7 x 2)
A= 12 / 14 - 20 / 14
A= (12 - 20) / 14
A= - 8 / 14
A= - 4 / 7
2014-10-26T11:41:22+01:00
A = 6/7 - 4/7 x 5/2
A = 6/7 - 20/14
A = 6 x 2 / 7 x 2 - 20/14
A = 12/14 - 20/14
A = - 8/14
A = 2 x - 4 / 2 x 7
A = - 4/7