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 1148570: 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 rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
let x be the age of the father's son
:
father's age = 5x
:
5x+18 = 2 * (x+18)
:
5x+18 = 2x+36
:
3x = 18
:
x = 6
:
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Father's current age = 5 * 6 = 30 years old
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:
check the answer
:
30+18 = 2 * (6+18)
:
48 = 48
:
answer checks