document.write( "Question 1144239: David Is 6 years older than his sister Delia. In 10 years the sum of There age 52. how old are David and Delia
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Algebra.Com's Answer #765274 by ikleyn(52787) $\"\"$ $\"About$

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document.write( "If David is x years old, then Delia is (x-6) years old.\r\n" );
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document.write( "In 10 years David will be  (x+10)  years old; Delia will be ((x-6)+10) = (x+4) years old.\r\n" );
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document.write( "The condition says\r\n" );
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document.write( "    (x+10) + (x+4) = 52.\r\n" );
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document.write( "It implies\r\n" );
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document.write( "    2x + 14 = 52,\r\n" );
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document.write( "    2x      = 52 - 14 = 38\r\n" );
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document.write( "     x      = 38/2 = 19.\r\n" );
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document.write( "ANSWER.  David's age is 19 years.  Delia is 19-6 = 13 years old.\r\n" );
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\n" ); document.write( "\n" ); document.write( "There is a bunch of lessons on age word problems in this site:\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
\n" ); document.write( "\n" ); document.write( "    - Age problems for mental solution \r
\n" ); document.write( "\n" ); document.write( "    - One unusual age word problem \r
\n" ); document.write( "\n" ); document.write( "    - Age problem for the day of April, 1 \r
\n" ); document.write( "\n" ); document.write( "    - OVERVIEW of lessons on age problems\r
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\n" ); document.write( "\n" ); document.write( "Read them attentively and become an expert in this field.\r
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