document.write( "Question 992237: James is 24 years old. James is twice as old as Jessie was when James was as old as Jessie is now. How old is Jessie ? \n" ); document.write( "

Algebra.Com's Answer #611918 by Edwin McCravy(20059) $\"\"$ $\"About$

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document.write( "The question is:\r\n" );
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\n" ); document.write( ">>How old is Jessie?
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document.write( "Let Jesse be x years old.\r\n" );
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\n" ); document.write( ">>James is 24 years old. James is twice as old
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document.write( "Let that be y years ago.\r\n" );
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document.write( "So y years ago, Jessie was x-y, and James' \r\n" );
document.write( "age now, 24, is twice that,\r\n" );
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document.write( "So 24 = 2(x-y)  \r\n" );
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document.write( "Now we ask: What else was true y years ago? \r\n" );
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document.write( "James was 24-y\r\n" );
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document.write( "And also, y years ago,...\r\n" );
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\n" ); document.write( ">>...James was as old as Jessie is now.
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document.write( "So James' age then, which was 24-y equals \r\n" );
document.write( "Jesse's age now, which is x years.  \r\n" );
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document.write( "So 24-y = x\r\n" );
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document.write( "We have this system of two equations and 2 unknowns.\r\n" );
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document.write( "Solve that and get x=18, y=6.\r\n" );
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document.write( "So Jesse is 18.\r\n" );
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document.write( "Checking: 6 years ago Jesse was 12.  \r\n" );
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document.write( "James is now 24, which is twice as old as Jesse was\r\n" );
document.write( "then, which was 12.\r\n" );
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document.write( "Also, 6 years ago, James was 18, and that's how \r\n" );
document.write( "old Jesse is now.   \r\n" );
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document.write( "So it checks.\r\n" );
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document.write( "Edwin

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