Question 170191
A man will be 3 times as old as his son will be in 9 years. If he is 6 times as old as his son now, how old is the son?
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Let x = son's age
then from "he is 6 times as old as his son now"
6x = man's age
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From: "A man will be 3 times as old as his son will be in 9 years." we get our equation:
6x+9 = 3(x+9)
6x+9 = 3x+27
3x+9 = 27
3x = 18
x = 6 years old (son's age)