document.write( "Question 728969: Today, Jen is three times older that Dave. Eight years before today, Jen was five times older that Dave. Calculate Jen`s age today. \n" ); document.write( "

Algebra.Com's Answer #445665 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+j+\"$ = Jen's age now
\n" ); document.write( "Let $\"+d+\"$ = Dave's age now
\n" ); document.write( "given:
\n" ); document.write( " $\"+j+=+3d+\"$
\n" ); document.write( " $\"+j+-+8+=+5%2A%28+d+-+8+%29+\"$
\n" ); document.write( "-------------------
\n" ); document.write( " $\"+j+-+8+=+5d+-+40+\"$
\n" ); document.write( "By substitution,
\n" ); document.write( " $\"+3d+-+8+=+5d+-+40+\"$
\n" ); document.write( " $\"+2d+=+32+\"$
\n" ); document.write( " $\"+d+=+16+\"$
\n" ); document.write( "and
\n" ); document.write( " $\"+j+=+3d+\"$
\n" ); document.write( " $\"+j+=+3%2A16+\"$
\n" ); document.write( " $\"+j+=+48+\"$
\n" ); document.write( "Jen is 48
\n" ); document.write( " \n" ); document.write( "

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