Réponses

2014-03-08T22:08:21+01:00
Bonsoir
IL=LM+JK
MJ=KJ-KN
NJ=MJ-KL
MJ=LN-IN
LM=NM+LN
?

2)
a)IJ+MN+CM+JC= (IJ+JC)+(CM+MN)=IC+CN=IN
b)CD-AD+RD-CS-RA=CD+DA+RD+SC+AR
=(CD+DA)+(AR+RD)+SC=(CA+AD)+SC=CD+SC=SC+CD=SD