document.write( "Question 379759: A Man is now 3 times as old as his son. He was 30 Years old when the son was born. How old is the son now? \n" ); document.write( "
Algebra.Com's Answer #269621 by fractalier(6550)\"\" \"About 
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Let m be the man's age and s be the son's age NOW. (always set up age problems in the now...)
\n" ); document.write( "Thus m = 3s. We also know he is 30 years older, or m = s + 30.
\n" ); document.write( "We can set them equal and get
\n" ); document.write( "m = 3s
\n" ); document.write( "m = s + 30
\n" ); document.write( "Therefore,
\n" ); document.write( "3s = s + 30
\n" ); document.write( "2s = 30
\n" ); document.write( "s = 15
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