Question

the age of the father is twice the sum the ages of his two children. After 20 years his age will be equal to the sum of ages of his 2 children. Find the age of the Father

Answer 1

the age of the father today is 40.
the sum of the age of the children today is 20
the age of the father today is 2 times the sum of the age of the children today.

the age of the father 20 years from now is 60.
the sum of the age of the children 20 years from now is 20 + 40 = 60.
the age of the father 20 years from now is equal to the sum of the age of the children 20 years from now.