document.write( "Question 770646: a father is 30years older than his son. 3years ago he was 3times as old as his son. How old is the father now? \n" ); document.write( "
Algebra.Com's Answer #469699 by Cromlix(4381)\"\" \"About 
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Father = 30 + Son
\n" ); document.write( "F = 30 + S
\n" ); document.write( "3years ago he was 3times as old as his son.
\n" ); document.write( "F - 3 = 3(S - 3)
\n" ); document.write( "Replace F with 30 + S
\n" ); document.write( "30 + S - 3 = 3(S - 3)
\n" ); document.write( "27 + S = 3S - 9
\n" ); document.write( "2S = 36
\n" ); document.write( "S = 18
\n" ); document.write( "Father is 48 years old
\n" ); document.write( "Son is 18 years old.
\n" ); document.write( "Hope this helps
\n" ); document.write( ":-)
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