SOLUTION: A father is 5 times as old as his son. In 18 years, the father will be twice as old as his son. How old is the father at present?

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Question 462444: A father is 5 times as old as his son. In 18 years, the father will be twice as old as his son. How old is the father at present?
Answer by amoresroy(361) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = the age of the father at present
x/5= the age of his son
x+18 = 2(x/5+18)
x+18 = 2x/5 + 36
3x/5 = 18
x = 18*5/3
x = 30
The father is 30 years old.