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antonia andra si alexandra au impreuna 58 ani.daca antonia si andra au 44 de ani iar andra si alexandra au 34 de ani.ce varsta are fiecare fata?
cati ani are alexandra?
cati ani are andra? dar antonia?
cati ani are antonia?


Răspuns :

antonia=a
andra=b
alexandra=c
a+b+c=58=>10+c+34-c+c=58=>c=14;a=24;b=20
a+b=44=>a+34-c=44=>a=10+c
b+c=34=>b=34-c  


alexandra = 58 - 44 =14
andra = 34 - 14 = 20
antonia = 44 - 20 = 24