Réponses

2013-11-03T12:55:35+01:00
7x - 2/3 = 4/5
7x = 4/5 + 2/3
x = (4/5+2/3)/7

Et tu fais toi même la suite parce que c'est simple :)
Meilleure réponse !
2013-11-03T14:15:34+01:00
7x - 2/3 = 4/5
7x = 4/5 + 2/3
7x = 12/15 + 10/15
7x = 22/15
7x/7 = (22/15) / 7
x = 22/105

3(x+4) = 7
3x + 12 = 7
3x = 7 - 12
3x = (-5)
3x/3 = (-5)/3
x = (-5)/3