Réponses

  • Utilisateur Brainly
2014-10-09T19:11:03+02:00
1)

B= (2 - 7 / 6) / (3 + 7 / 12)
B= (12 / 6 - 7 / 6) / (36 / 12 + 7 / 12)
B= (5 / 6) / (43 / 12)
B= 5 / 6 x 12 / 43
B= (5 x 12) / (6 x 43)
B= 60 / 258
B= (6 x 10) / (6 x 43)
B= 10 / 43