document.write( "Question 1044717: Katie is 2 years younger than her brother. In 12 years, her brother will be twice as old as she is now. How old is Katie now?
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Algebra.Com's Answer #660059 by ikleyn(52799) $\"\"$ $\"About$

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\n" ); document.write( "Katie is 2 years younger than her brother. In 12 years, her brother will be twice as old as she is now. How old is Katie now?
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document.write( "B - K = 2            (1)   (\"Katie is 2 years younger than her brother\")\r\n" );
document.write( "B + 12 = 2K          (2)   (\"In 12 years . . . )\r\n" );
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document.write( "To solve this system, express B = K + 2 from (1) and then substitute it into 2).\r\n" );
document.write( "You will get a single equation for K:\r\n" );
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document.write( "(K + 2) + 12 = 2K,  or\r\n" );
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document.write( "K + 14 = 2K,  or\r\n" );
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document.write( "K = 14. \r\n" );
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document.write( "Answer.  Katie is 14 years now.\r\n" );
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\n" ); document.write( "\n" ); document.write( "For age problems, see the lessons\r
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\n" ); document.write( "\n" ); document.write( "    - A fresh formulation of a traditional age problem\r
\n" ); document.write( "\n" ); document.write( "    - Really intricate age word problem\r
\n" ); document.write( "\n" ); document.write( "    - Selected age word problems from the archive\r
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