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Viodana64
a fost răspuns

Daca a+2b+3c=14 si b+2c+3a=11,aflati 5a+5b+8c

Răspuns :

Nutyamariia
5a+5b+8c= 3a+b+2c+2a+4b+6c= 11+ 2(a+2b+3c)= 11+ 2*14= 11+28=39