###Human: Gabriel is 3 years younger than Frank. The current total of their ages right now is 17. What is Frank's age?, ### Assistant: Let X be Frank's age.
So Gabriel is X-3 years old.
The total of their ages is X + (X-3) = 17 years old.
2X-3 = 17
2X = 20
X = 10
So Frank is X = 10 years old. 
 So the answer is :  10