If John has just turned 39, then 3 years ago he was 39-3=36 years old.
If John was twice as old as James will be in 6 years, then James will be 36/2=18 years old in 6 years.
Currently, James is 18-6=12 years old.
If James' older brother is 4 years older than James, then James' older brother is 12+4=16 years old.
#### 16
The answer is: 16
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
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?

### Answer:
