document.write( "Question 1043768: The difference between two integers is 5. If the reciprocal of the smaller is added to twice the reciprocal of the larger the result is 23/66. Find the two integers. \n" ); document.write( "
Algebra.Com's Answer #658934 by Edwin McCravy(20067)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "Let y = the larger integer\r\n" );
document.write( "Let x = the smaller integer\r\n" );
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document.write( "\"system%28y-x=5%2C%281%2Fx%29%2B2%281%2Fy%29=23%2F66%29\"\r\n" );
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document.write( "\"y\"\"%22%22=%22%22\"\"5%2Bx\"\r\n" );
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document.write( "Substitute (5+x) for y in\r\n" );
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document.write( "\"%281%2Fx%29%2B2%281%2Fy%29\"\"%22%22=%22%22\"\"23%2F66%29\"\r\n" );
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document.write( "\"%281%2Fx%29%2B2%281%2F%285%2Bx%29%29\"\"%22%22=%22%22\"\"23%2F66%29\"\r\n" );
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document.write( "\"%281%2Fx%29%2B2%2F%285%2Bx%29\"\"%22%22=%22%22\"\"23%2F66%29\"\r\n" );
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document.write( "LCD = 66x(5+x)\r\n" );
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document.write( "Multiply each numerator by every factor of\r\n" );
document.write( "the denominator which is not under it:\r\n" );
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document.write( "\"1%2866%285%2Bx%29%29%2B2%2866x%29\"\"%22%22=%22%22\"\"23%28x%285%2Bx%29%29%29\"\r\n" );
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document.write( "\"66%285%2Bx%29%2B132x\"\"%22%22=%22%22\"\"23x%285%2Bx%29\"\r\n" );
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document.write( "\"330%2B66x%2B132x\"\"%22%22=%22%22\"\"115x%2B23x%5E2\"\r\n" );
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document.write( "\"330%2B198x\"\"%22%22=%22%22\"\"115x%2B23x%5E2\"\r\n" );
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document.write( "Subtract 115x from both sides\r\n" );
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document.write( "\"330%2B83x\"\"%22%22=%22%22\"\"23x%5E2\"\r\n" );
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document.write( "Subtract 23x2 from both sides\r\n" );
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document.write( "to get 0 on the right side\r\n" );
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document.write( "\"-23x%5E2%2B330%2B83x\"\"%22%22=%22%22\"\"0\"\r\n" );
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document.write( "Arrange left side in descending order:\r\n" );
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document.write( "\"-23x%5E2%2B83x%2B330\"\"%22%22=%22%22\"\"0\"\r\n" );
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document.write( "Multiply through by -1:\r\n" );
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document.write( "\"23x%5E2-83x-330\"\"%22%22=%22%22\"\"0\"\r\n" );
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document.write( "There may be a way to factor that but\r\n" );
document.write( "when the numbers are that big, it's\r\n" );
document.write( "easier to use the quadratic formula,\r\n" );
document.write( "especially if you have a calculator:\r\n" );
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document.write( "\"x+\"\"%22%22=%22%22\"\"+%28-b+%2B-+sqrt%28+b%5E2-4ac+%29%29%2F%282a%29+\"\r\n" );
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document.write( "\"x+\"\"%22%22=%22%22\"\"+%28-%28-83%29+%2B-+sqrt%28+%28-83%29%5E2-4%2823%29%28-330%29+%29%29%2F%282%2A%2823%29%29+\"\r\n" );
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document.write( "\"x+\"\"%22%22=%22%22\"\"+%2883+%2B-+sqrt%286889%2B30360%29%29%2F46+\"\r\n" );
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document.write( "\"x+\"\"%22%22=%22%22\"\"+%2883+%2B-+sqrt%2837249%29%29%2F46+\"\r\n" );
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document.write( "\"x+\"\"%22%22=%22%22\"\"+%2883+%2B-+193%29%2F46+\"\r\n" );
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document.write( "Using the +\r\n" );
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document.write( "\"x+\"\"%22%22=%22%22\"\"+%2883+%2B+193%29%2F46+\"\r\n" );
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document.write( "\"x=276%2F46\"\r\n" );
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document.write( "\"x\"\"%22%22=%22%22\"\"6\"\r\n" );
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document.write( "Using the -\r\n" );
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document.write( "\"x+\"\"%22%22=%22%22\"\"+%2883+-+193%29%2F46+\"\r\n" );
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document.write( "\"x\"\"%22%22=%22%22\"\"-110%2F46\"\r\n" );
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document.write( "\"x\"\"%22%22=%22%22\"\"-55%2F23\"\r\n" );
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document.write( "The problem calls for an integer.  That's not\r\n" );
document.write( "an integer, so we can discard that value of x.\r\n" );
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document.write( "So x = 6\r\n" );
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document.write( "Substitute into\r\n" );
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document.write( "\"y\"\"%22%22=%22%22\"\"5%2Bx\"\r\n" );
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document.write( "\"y\"\"%22%22=%22%22\"\"5%2B6\"\r\n" );
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document.write( "\"y\"\"%22%22=%22%22\"\"11\"\r\n" );
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document.write( "Answers: Larger integer = 11, Smaller integer = 6\r\n" );
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document.write( "Edwin
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