document.write( "Question 595733: Dou is working on a math problem in class, By mistake he multiplies by 10 and divides by 5 instead of multiplying by 5 and then dividing by 10. If the incorrect answer is 3, what is the correct answer? \n" ); document.write( "
Algebra.Com's Answer #377283 by Edwin McCravy(20054)\"\" \"About 
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document.write( "The answer may not be an integer.  Never just assume that every answer has to\r\n" );
document.write( "come out to be a positive whole number.  You should not rule out negative or\r\n" );
document.write( "fraction answers unless you can tell that the answer must be a positive whole number.)\r\n" );
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\n" ); document.write( "\n" ); document.write( ">>...By mistake he multiplies by 10 and divides by 5...<<
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document.write( "That's the same as doubling, or multiplying by 2, because 10/5 = 2\r\n" );
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\n" ); document.write( ">>...instead of multiplying by 5 and then dividing by 10...<<
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document.write( "That's the same as multiplying by 1/2, because 5/10 = 1/2\r\n" );
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document.write( "So he made the mistake of doubling it instead of halving it.  When\r\n" );
document.write( "he doubled it he got 3.   So he had to have started with half of 3\r\n" );
document.write( "which is 1 1/2 or 3/2.  So he should have halved that 3/2 and gotten 3/4.\r\n" );
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document.write( "Edwin
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