document.write( "Question 219634: 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?
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Algebra.Com's Answer #165162 by checkley77(12844)\"\" \"About 
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M=3x
\n" ); document.write( "J=x
\n" ); document.write( "In 7 years:
\n" ); document.write( "(3x+7)=2(x+7)
\n" ); document.write( "3x=7=2x+14
\n" ); document.write( "3x-2x=14-7
\n" ); document.write( "x=7 Jenny's age now.
\n" ); document.write( "3*7=21 Matthew's age now.
\n" ); document.write( "Proof:
\n" ); document.write( "3*7+7=2(7+7)
\n" ); document.write( "21+7=2*14
\n" ); document.write( "28=28
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