document.write( "Question 1205771: a book shelf contain x book. When 4/5 of the book are removed,
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Algebra.Com's Answer #842796 by Edwin McCravy(20065)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "\"highlight%28cross%28a%29%29\" \"highlight%28A%29\" book shelf \"highlight%28cross%28contain%29%29\" \"highlight%28contains%29\" x \"highlight%28cross%28book%29%29\" \"highlight%28books%29\". When 4/5 of the\r\n" );
document.write( "\"highlight%28cross%28book%29%29\" \"highlight%28books%29\" are removed, \"highlight%28cross%28i%29%29\" \"highlight%28I%29\" have 25 \"highlight%28cross%28book%29%29\" \"highlight%28books%29\" left. \"highlight%28cross%28how%29%29\" \"highlight%28How%29\" many\r\n" );
document.write( "\"highlight%28cross%28book%29%29\" \"highlight%28books%29\" were on the \"highlight%28cross%28shelf%29%29\" \"highlight%28%22shelf%3F%22%29\"\r\n" );
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document.write( "\"%28matrix%282%2C1%2Cx%2Cbooks%29%29-expr%284%2F5%29%28matrix%282%2C1%2Cx%2Cbooks%29%29\"\"%22%22=%22%22\"\"%28matrix%282%2C1%2C25%2Cbooks%29%29\"\r\n" );
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document.write( "\"x-expr%284%2F5%29x+=+25\"\r\n" );
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document.write( "Multiply through by 5 to clear the fraction:\r\n" );
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document.write( "\"5x-4x=125\"\r\n" );
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document.write( "\"x=125\" books.\r\n" );
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document.write( "Edwin
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