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a fost răspuns

Aflati numerele a,b si c care verifica simultan egalitatile; a+b=24 b+c=18 c+a=26

Răspuns :

a=24-b 24-b+b=24 24-2b=24 2b=24+24=48 b=48:2=24 a=24-24=0
b=18-c 18-c+c=18 18-2c=18 2c=18+18=36 c=36:2 c=18
c=26-a 26-a+a=26 26-2a=26 2a=26+26=52 a=52:2=26

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