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DACA A PLUS B egal cu 1032
B plus C egal cu 433

A plus C egal cu 1401 ,atunci 2A PLUS 2B PLUS 2 C EGAL ???





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Răspuns :

A+B=1032
B+C=433
A+C=1401
A+B+B+C+A+C=1032+433+1401
=2A+2B+2C=2866