SOLUTION: a father is 4 times as old as his son.in 10 years he will be twice as old .how old is the father at the present ?

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Question 840503: a father is 4 times as old as his son.in 10 years he will be twice as old .how old is the father at the present ?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
f=4s,
f+10=2*(s+10)
f+10=2s+20
4s+10=2s+20
2s=10
x=5
f=20
That means the guy became a father at age 15
Disgusting!