He is twice as old as his brothers. But you don't know how old his brothers are. Let's represent his brothers age with Y. So he is twice of Y. That is 2Y
2Y is his age. Now we need to find Y which is his brothers age
2Y=14
Divide both sides by 2
Y=14/2
Y=7
His brother James is 7 years old. Hope I helped. Goodluck