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a+b+c=3407,b+c=1782,b+a=1468,c-a=?

Răspuns :

a+b+c=3407 ; b+c=1782, inlocuim b+c in prima relatie si aflam a

a+1782=3407 ; a=3407-1782=1625

b+a=1468, inlocuim b+a in prima relatie si aflam c ; c+1468=3407, c=3407-1468=1939

c-a = 1939-1625 = 314