Question

a father is 20 years older than his son 5 years ago he was 3 times as old as his son.find their prasent age​

Answer 1

Present ages: son 15, father 35.5
5 years ago : son 10, father 30

Answer 2

Son -- 10

Dad -- 30

Explanation:

5 years ago the dad was 15 years older than his son.15 / 3 = 5. The son was 5 five years ago he would be 10 now because 5 years ago he was 5. Since the son is 10 the dad must be 30. I know this because the dad is 20 years older than his son.