document.write( "Question 1063181: I am half the age of my dad plus four but I know that my dad is eight years older than my mum and my mum gave birth to me at the age of twenty eight. What is my age? \n" ); document.write( "

Algebra.Com's Answer #678227 by ikleyn(52786) $\"\"$ $\"About$

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\n" ); document.write( "I am half the age of my dad plus four but I know that my dad is eight years older than my mum and my mum gave birth to me
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document.write( "The first equation is \r\n" );
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document.write( "I =          (1)   (I is \"my age\", D is dad's age)\r\n" );
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document.write( "The second equation is \r\n" );
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document.write( "D - I = 28 + 8.   (2)   (My dad is 28+8 years older than me).\r\n" );
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document.write( "You can rewrite equations (1) and (2) in the form\r\n" );
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document.write( "2I = D + 8     (1')\r\n" );
document.write( "D - I = 36.    (2')\r\n" );
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document.write( "From (2'), express D = 36 + I and then substitute it into (1') replacing D. You will get \r\n" );
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document.write( "2I = (36+I) + 8  ---->  2I = I + 44   ---->  I = 44.\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( "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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