Since her brother is m years old, you would have to multiply her brother's age by 2 since the question says "...twice here brother's age." This part would equal to the equation 2x. The question also says " ...3 years more..." This would change the equation with the addtion of 3. The completed problem would then be 2x+3. Hope this helped!
The numbers are 5 and 12. Smaller number = x Larger number = y x +y =17 y = 3x - 3 x +3x -3 = 17 4x = 20 x = 5 smaller number is 5 y = 3(5) - 3 y = 12 larger number is 12.
