SOLUTION: The difference between the present age of the father and son is 30. 5 years ago, the son age is one seventh of the father age. find their present age.
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Question 748610: The difference between the present age of the father and son is 30. 5 years ago, the son age is one seventh of the father age. find their present age. Answer by tommyt3rd(5050) (Show Source):
You can put this solution on YOUR website! The difference between the present age of the father and son is 30 means
F-S=30
which we rewrite as F=S+30
5 years ago, the son age is one seventh of the father age means
7(S-5)=F-5
which we rewrite as F=7S-30
Now we can write
S+30 = 7S-30
6S =60
S=10
and so F=S+30=10+30=40
