Problem: a is two years older than b who is twice as old as c . if the total ages of a , b and c be 27 . what is the age of b ?
Rationale: "c age x , then b age is 2 x so a age is 2 x + 2 . ( 2 x + 2 ) + 2 x + x = 27 5 x = 25 x = 5 so b is 2 x = 2 ( 5 ) 2 x 5 = 10 answer : b"
annotated_formula: divide(multiply(subtract(27, const_2), const_2), add(const_4, const_1))