document.write( "Question 1143742: How many boys are there in a group of 27 students if there are four-fifths as many girls as there are boys?
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Algebra.Com's Answer #764627 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
How many boys are there... \r
\n" ); document.write( "\n" ); document.write( "\"matrix%281%2C3%2CB%2C%22%22=%22%22%2C%22%3F%22%29\"\r
\n" ); document.write( "\n" ); document.write( "...in a group of 27 students... \r
\n" ); document.write( "\n" ); document.write( "\"matrix%281%2C3%2CB%2BG%2C%22%22=%22%22%2C27%29\"\r
\n" ); document.write( "\n" ); document.write( "...if there are four-fifths as many girls as there are boys?\r
\n" ); document.write( "\n" ); document.write( "\"matrix%281%2C3%2CG%2C%22%22=%22%22%2Cexpr%284%2F5%29B%29\"
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document.write( "Substitute \"expr%284%2F5%29B\" for G in\r\n" );
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document.write( "\"matrix%281%2C3%2CB%2BG%2C%22%22=%22%22%2C27%29\"\r\n" );
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document.write( "\"matrix%281%2C3%2CB%2Bexpr%284%2F5%29B%2C%22%22=%22%22%2C27%29\"\r\n" );
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document.write( "Multiply every term on both sides by the LCD, which is 5:\r\n" );
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document.write( "\"matrix%281%2C3%2C5%2AB%2B5%2Aexpr%284%2F5%29B%2C%22%22=%22%22%2C5%2A27%29\"\r\n" );
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document.write( "\"matrix%281%2C3%2C5B%2Bcross%285%29expr%284%2Fcross%285%29%29B%2C%22%22=%22%22%2C5%2A27%29\"\r\n" );
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document.write( "\"matrix%281%2C3%2C5B%2B4B%2C%22%22=%22%22%2C135%29\"\r\n" );
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document.write( "\"matrix%281%2C3%2C9B%2C%22%22=%22%22%2C135%29\"\r\n" );
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document.write( "Divide both sides by 9:\r\n" );
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document.write( "\"matrix%281%2C3%2C9B%2F9%2C%22%22=%22%22%2C135%2F9%29\"\r\n" );
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document.write( "\"matrix%281%2C3%2CB%2C%22%22=%22%22%2C15%29\"\r\n" );
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document.write( "There are 15 boys.\r\n" );
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document.write( "Edwin

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