SOLUTION: seven years back the age of father was 5 times of the age of his son. it will be twice after 14 years. find their present ages

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Question 1011376: seven years back the age of father was 5 times of the age of his son. it will be twice after 14 years. find their present ages
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
f, father's age
f-7, father's age seven years back
f+14, father after 14 years
s, son's age

seven years back the age of father was 5 times of the age of his son.
f-7=5%28s-7%29

it(father's age) will be twice after 14 years.
f%2B14=2%28s%2B14%29

Solve this system for f and s.
system%28f-7=5s-35%2Cf%2B14=2s%2B28%29