Twice Jill's age is 2*20=<<2*20=40>>40
If Roger's age is 5 more than twice Jill's age, he is 5+40=45 years old.
In 15 years, Jill will be 20+15=<<20+15=35>>35 years old.
Roger's age will be 45+15=<<45+15=60>>60 years old in 15 years.
The age difference between Roger and Jill in fifteen years will be 60-35=<<60-35=25>>25 years
In 15 years, the age difference between Roger and Jill will be 30 years less than Finley's age, meaning in fifteen years Finley will be 30+25=<<30+25=55>>55 years old.
Currently, Finley is 55-15=<<55-15=40>>40 years old.
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