Problem: a man is 30 years older than his son . in two years , his age will be twice the age of his son . the present age of the son is
Rationale: "solution let the son ' s present age be x years . then , man ' s present age = ( x + 30 ) years . then â € ¹ = â € º ( x + 30 ) + 2 = 2 ( x + 2 ) â € ¹ = â € º x + 32 = 2 x + 4 x = 28 . answer b"
annotated_formula: divide(subtract(30, subtract(multiply(const_2, const_2), const_2)), subtract(const_2, const_1))