Question

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

Answer 1

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