A+в+с=? а+в=3800000 в+с=5200000 а+с=5700000

Question

A+в+с=?
а+в=3800000
в+с=5200000
а+с=5700000

Answer 1

А+в+в+с+а+с=2(а+в+с)=3800000+5200000+5700000=14700000
A+в+с=14700000/2=7350000