Some equations are solved on the basis of a certain system. On the same basis, find out the correct answer from amongst the four alternatives for the unsolved equation.
5 + 3 + 7 = 573; 6 + 3 + 9 = 693; 6 + 4 + 8 = 684; 9 + 4 + 5 = ?
Answer & explanation
Correct answer: option 4
