SOLUTION: A man is nine times as old as his son. In nine years, he will be only three times as old as his son. How old are each now?
Show all three methods (graphing, substitution and eli
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-> SOLUTION: A man is nine times as old as his son. In nine years, he will be only three times as old as his son. How old are each now?
Show all three methods (graphing, substitution and eli
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Question 378045: A man is nine times as old as his son. In nine years, he will be only three times as old as his son. How old are each now?
Show all three methods (graphing, substitution and elimination) for solving. Answer by richard1234(7193) (Show Source):
You can put this solution on YOUR website! Suppose the son's age is x years, and the man's age is 9x years.
In 9 years, the son's age will be x+9, and the man's age will be 9x+9 which is three times the son's age.
Therefore we have 9x+9 = 3(x+9) --> 9x+9 = 3x+27 --> x = 3 --> The son is 3 years old and the man is 27 years old.
This seems like the only convenient way to solve the problem -- it is possible using graphing but it is not the best way.
