Réponses

2013-04-01T13:19:20+02:00

51

 

A=3a+5-(2a+7)+(8-5a)

3a+5-2a-7+8-5a

-4a+6

 

B=-b+4+(3b-2)-(8b-5)

-b+4+3b-2-8b+5

-6b+7

 

C=6-5c+3c-(4-6c)+5+(7-2c)

6-5c+3c-4+6c+5+7-2c

2c+14

 

D=d-1-(3d+4)+(5-4d)-(7d+5)+5

d-1-3d-4+5-4d-7d-5+5

-13d