document.write( "Question 348905: Sarah is 3 times older than Joe. Their ages added together add up to 16. How old is Sarah? \n" ); document.write( "

Algebra.Com's Answer #249405 by Fombitz(32388) $\"\"$ $\"About$

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Let S be Sarah's age and J be Joe's age,
\n" ); document.write( " $\"S=3%2AJ\"$
\n" ); document.write( " $\"S%2BJ=16\"$
\n" ); document.write( "Substitute,
\n" ); document.write( " $\"3J%2BJ=16\"$
\n" ); document.write( " $\"4J=16\"$
\n" ); document.write( " $\"highlight%28J=4%29\"$ years old
\n" ); document.write( "Then
\n" ); document.write( " $\"S=3%284%29\"$
\n" ); document.write( " $\"highlight%28S=12%29\"$ years old \n" ); document.write( "

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