document.write( "Question 1121307: I was asked to solve this linear equation.
\n" ); document.write( " A man is four times as old as his son. In four years time he will be three times older in age, what are their ages now \n" ); document.write( "
Algebra.Com's Answer #737137 by ikleyn(52781)\"\" \"About 
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\n" ); document.write( "I was asked to solve this linear equation.
\n" ); document.write( " A man is four times as old as his son. In four years time he will be three times older in age, what are their ages now
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\n" ); document.write( "\n" ); document.write( "            1.   Hey !   It is not a linear equation ! \r
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\n" ); document.write( "\n" ); document.write( "                  It is age word problem,  instead.\r
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\n" ); document.write( "\n" ); document.write( "            2.   Your formulation in the post is FATALLY WRONG.\r
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\n" ); document.write( "\n" ); document.write( "                  The correct formulation is THIS :\r
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document.write( "    A man is four times as old as his son. In four years \"highlight%28cross%28time%29%29\" he will be three times \"highlight%28cross%28older_in_age%29%29\" as old as his son. \r\n" );
document.write( "    What are their ages now ?\r\n" );
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document.write( "x = 4y              (x= the father age; y = the son age)\r\n" );
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document.write( "x + 4 = 3*(y+4)     (in 4 years . . . )\r\n" );
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document.write( "4y + 4 = 3y + 12\r\n" );
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document.write( "4y - 3y = 12 - 4\r\n" );
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document.write( "y = 8.\r\n" );
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document.write( "Answer.  The son is 8 years now.  The father's age is 4*8 = 32 years.\r\n" );
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\n" ); document.write( "\n" ); document.write( "There is a bunch of lessons on age word problems \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( "in this site.\r
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\n" ); document.write( "\n" ); document.write( "Read them and become an expert in solving age problems.\r
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\n" ); document.write( "\n" ); document.write( "Also, you have this free of charge online textbook in ALGEBRA-I in this site\r
\n" ); document.write( "\n" ); document.write( "    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.\r
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\n" ); document.write( "\n" ); document.write( "The referred lessons are the part of this online textbook under the topic \"Age word problems\".\r
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\n" ); document.write( "\n" ); document.write( "Save the link to this online textbook together with its description\r
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\n" ); document.write( "\n" ); document.write( "Free of charge online textbook in ALGEBRA-I
\n" ); document.write( "https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson\r
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\n" ); document.write( "\n" ); document.write( "to your archive and use it when it is needed.\r
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