document.write( "Question 1047585: Five years ago, Amy was 20 years younger than her father, this year she will be half her fathers age. How old is Amy? \n" ); document.write( "

Algebra.Com's Answer #663103 by ikleyn(52781) $\"\"$ $\"About$

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\n" ); document.write( "Five years ago, Amy was 20 years younger than her father, this year she $\"highlight%28cross%28will_be%29%29\"$ IS half her fathers age. How old is Amy?
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document.write( "A - 5 = (F-5) - 20,   (1)    (\"Five years ago, Amy was 20 years younger than her father\")\r\n" );
document.write( "2A = F.               (2)    (\"this year she is half her fathers age\")\r\n" );
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document.write( "Substitute (2) into (1), i.e. replace F in the right side of (1) by 2A, according (2). You will get\r\n" );
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document.write( "A - 5 = 2A - 5 - 20,  or\r\n" );
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document.write( "20 = A.\r\n" );
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document.write( "Answer. Amy is 20 years old now. Her father is 2*A = 2*20 = 40 years.\r\n" );
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\n" ); document.write( "\n" ); document.write( "The phrase \"Five years ago, Amy was 20 years younger than her father\" seems to be strange.
\n" ); document.write( "If five years ago Amy was 20 years younger than her father, then she will be always 20 years younger until both are alive.\r
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\n" ); document.write( "\n" ); document.write( "The phrase \"this year she will be half her fathers age\" is BAD and is never used in this kind of problems.
\n" ); document.write( "Because it creates unnecessary thoughts in the reader's mind.
\n" ); document.write( "Its only destination is to confuse the reader.\r
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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( "    - 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( "It contains a lot of other word problems and many other interesting and useful things.\r
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