SOLUTION: Alvin is now 20 years older than his son. In 10 years, he will be twice as old as his son's age. What are their present age?
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Question 889725: Alvin is now 20 years older than his son. In 10 years, he will be twice as old as his son's age. What are their present age?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
1.
In ten years,
2.
Substituting from eq. 1,
Then,
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