Réponses

2013-11-14T16:15:23+01:00
Meilleure réponse !
2013-11-14T17:02:05+01:00
7x+7x3=7(x+3)
9y-9x4=9(y-4)
3a-3b=3(a-b)
6x+30=6(x+5)
5y-25=5(y-5)
7a-4a=a(7-4)
6x+x=x(6+1)
8y-8=8(y-1)
-3a-3=-3(a+1)