document.write( "Question 1053218: A father is three times as old as the son. Nine years ago the father was four times as old as the son find the present ages \n" ); document.write( "

Algebra.Com's Answer #668474 by ikleyn(52786) $\"\"$ $\"About$

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\n" ); document.write( "A father is three times as old as the son. Nine years ago the father was four times as old as the son find the present ages.
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document.write( "F = 3S,          (1)   (\"A father is three times as old as the son\")\r\n" );
document.write( "F-9 = 4*(S-9)    (2)   (\"Nine years ago the father was four times as old as the son\")\r\n" );
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document.write( "Substitute (1) into (2). You will get\r\n" );
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document.write( "3S-9 = 4(S-9),\r\n" );
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document.write( "3S-9 = 4S - 36   --->  S = 27.\r\n" );
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document.write( "The son is 27 years old now. The father is 3*27 = 81 years old now.\r\n" );
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document.write( "Answer.  The son is 27 years old now. The father is 81 years old now.\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 problem for the day of April, 1 \r
\n" ); document.write( "\n" ); document.write( "    - OVERVIEW of lessons on age problems\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 problems\".\r
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