John has just turned 39. 3 years ago, he was twice as old as James will be in 6 years. If James' older brother is 4 years older than James, how old is James' older brother? Let's answer step by step:
John was 39 - 3 = 36 years old 3 years ago. So that means in 6 years James will be 36 / 2 = 18 years old. So right now James is 18 - 6 = 12 years old. So James's older brother is 12 + 4 = 16 years old. The answer: 16.