Réponses

2013-01-17T17:14:30+01:00

toi + moi = lui

donc 4+x = 7 donc x = 7-4 = 3

toi = 4

moi = 3

lui = 7

 

nous = toi +moi +lui = 14

2013-01-17T17:16:58+01:00