Réponses

2014-10-01T18:47:48+02:00


A = (2/7 - 1/3) x 7/4 - 5/4

A = (6/21 - 7/21) x 7/4 - 5/4

A = (-1/21) x 7/4 - 5/4

A = (-7/84) - 5/4

A = (-7/84) - 105/84

A = -112/84

Et tu peut simplifier