document.write( "Question 268253: Matthew is 3 times as old as Jenny. In 7 years, he will be twice as old as she will be then. How old is each now? \n" ); document.write( "

Algebra.Com's Answer #196638 by vleith(2983) $\"\"$ $\"About$

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Let m represetn mathews age today and j represent jenny's age today
\n" ); document.write( "Given
\n" ); document.write( " $\"m+=+3j\"$
\n" ); document.write( " $\"m%2B7+=+2%28j%2B7%29\"$
\n" ); document.write( " $\"m%2B7+=+2j%2B14\"$
\n" ); document.write( "Substitute from the first equation
\n" ); document.write( " $\"3j+%2B+7+=+2j%2B14\"$
\n" ); document.write( " $\"j+=+7\"$
\n" ); document.write( "So Jenny is 7
\n" ); document.write( "That makes Matthew 3*7 =21
\n" ); document.write( " \n" ); document.write( "

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