Let age of Rohit’s brother be x years.

So according to the question , Rohit’s age = twice his brother = 2x years

Sum of their ages = 24 years

=> x + 2x = 24

=> 3x = 24

=> x = 24/3 ( here we transpose the 3 being multiplied on left hand side to divide on right hand side)

=> x = 8 years

=> 2x = 8 x 2 = 16 years

So Rohit’s brother’s age is 8 years and Rohit’s age is 16 years👍