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a+b=90 a+c=79 b+c=97 . Cat e a, b si c?

Răspuns :

2a+2b+2c=266
a+b+c=133
a=36
b=54
c=43
a+b=90=>a=90-b
a+c=79=>c=b-11
b+b-11=97
=>b=54=>c=43=>a=36