document.write( "Question 1053216: A father is three times as old as the son. Nine years ago the father was four timesas old as the son find the present ages \n" ); document.write( "

Algebra.Com's Answer #668473 by Fombitz(32388) $\"\"$ $\"About$

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$\"F=3S\"$
\n" ); document.write( "Nine years ago,
\n" ); document.write( " $\"F-9=4%28S-9%29\"$
\n" ); document.write( " $\"F-9=4S-36\"$
\n" ); document.write( " $\"F=4S-27\"$
\n" ); document.write( "Substituting from above,
\n" ); document.write( " $\"3S=4S-27\"$
\n" ); document.write( " $\"-S=-27\"$
\n" ); document.write( " $\"S=27\"$
\n" ); document.write( "So,
\n" ); document.write( " $\"F=3%2827%29\"$
\n" ); document.write( " $\"F=81\"$
\n" ); document.write( " \n" ); document.write( "

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