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a+b=1032 b+c=433 a+c=1401 atunci 2a+2b+2c=

Răspuns :

2a+2b+2c= 1032+433+1401=2866
a + b = 1032
b + c = 433
a + c = 1401
2a + 2b + 2c = 1032 + 433 + 1401 = 2866