Question 767604
Let the son's present age be x years
then father's age is 2x years.
12 years ago,
The son's age is 2(x-12)=4(x-12)
2x-24=4x-48
2x-4x=-48+24
-2x=-24
therefore x=12
Son's age is 12 years
Father's age is 24 years