document.write( "Question 100568: A boy is 4 years old and his sister is three times as old as he is. When the boy is 12
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Algebra.Com's Answer #73210 by Edwin McCravy(20056)\"\" \"About 
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document.write( "A boy is 4 years old and his sister is three times as old as he is. When the\r\n" );
document.write( "boy is 12 years old, how old will his sister be?\r\n" );
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document.write( ">>...A boy is 4 years old and his sister is three times as old as he is...<< \r\n" );
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document.write( "That tells us that the sister is three times 4, or 12.  She is therefore 8 \r\n" );
document.write( "years older than her 4-year-old brother.\r\n" );
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document.write( ">>...When the boy is 12 years old, how old will his sister be?...<<\r\n" );
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document.write( "When the boy is 12, his sister will be 8 years older than him, so she'll be 20.\r\n" );
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document.write( "You don't need any algebra for that.  You just think it out. \r\n" );
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document.write( "Edwin

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