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 ?
"let the son ' s present age be x years . then , man ' s present age = ( x + 30 ) years . ( x + 30 ) + 2 = 2 ( x + 2 ) x + 32 = 2 x + 4 = > x = 28 . answer : e"
divide(subtract(30, subtract(multiply(const_2, const_2), const_2)), subtract(const_2, const_1))