Réponses

2012-09-25T17:15:20+02:00

C=3(u-v+9)

D=16(13a/16 -b +c)

 

7 x (a + x -3) =7a+7x-21

(3 + t ) x 9=27+9t

12 x (x-y-z)=12x-12y-12z