document.write( "Question 1042191: In five years time, John will be three times as old he was nine years a go. How old is he now?
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Algebra.Com's Answer #657149 by ikleyn(52782) $\"\"$ $\"About$

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\n" ); document.write( "In five years time, John will be three times as old he was nine years a go. How old is he now?
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document.write( "Let x be John's age now.\r\n" );
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document.write( "In five years time, John's age will be (x+5).\r\n" );
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document.write( "Nine years ago John was (x-9) years.\r\n" );
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document.write( "The condition says that \r\n" );
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document.write( "x + 5 = 3*(x-9).\r\n" );
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document.write( "Simplify and solve it for x:\r\n" );
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document.write( "x + 5 = 3x - 27  --->  5+27 = 2x  --->  2x = 32  --->  x =  = 16.\r\n" );
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document.write( "Answer.  John is 16 years old now.\r\n" );
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document.write( "Check:  1) 16+5 = 21;  2) 16-9 = 7;  3) 21 = 7*3.   Checked - OK!\r\n" );
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\n" ); document.write( "\n" ); document.write( "For solved age problems see the lessons\r
\n" ); document.write( "\n" ); document.write( "    - Age problems and their solutions\r
\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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