A man will be just 4 times as old as he was 15 years ago. What is his present age?
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25 years
Let the man's present age =x years
Fifteen years ago his age =(x−15) years
Fifteen years hence his age =(x+15) years
Given, (x+15)=4(x−15)
⇒x+15=4x−60
⇒4x−x=15+60
⇒3x=75
⇒x=25
∴ man's present age is 25 years.
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