Réponses

2013-01-31T18:56:08+01:00
2013-01-31T19:00:31+01:00

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

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

= -4a+6

 

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

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

= -6b+7

 

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

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

= -4c+18

 

 

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

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

= -5d-10