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vreau rezolvarea:
a+b+c=79
a+b=54
b+c=43
a,b,c = ?


Răspuns :

Adun ultimele relatii  a+b+b+c=97
79+b=97
b=18
a=54-18=36
c=43-18=25
54+c=79
c=79-54=25
b+25=43
b=43-25=18
a+43=79
a=79-43=36
a+b+c=36+18+25=79