Question 1002578

Jack is 13 now

After 7 years he will be 20

grandpa will be 4 time older than Jake

20 + 80 = 100

(three years from now means 4 years earlier )

4 years ago grandpa was 96

and at that time he was twice dad,s age

dad,s age = 48

dads age now is 48-3 = 45 years