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Dacă : a+b= 1032; b+c=433; a+ c=1401;2a+2b+2c=?.Urgent

Răspuns :

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