document.write( "Question 177792: Can you help me solve this problem {{n/n-3 + n = 7n-18/n-3}}?
\n" ); document.write( "I know that you will need to use n-3 as a common denominator, but once i have done that i come out with {{n+n^2-3n=7n-18}}. On my teachers answer sheet it says the answer is suppose to be 6 but how is that possible?
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Algebra.Com's Answer #132789 by MathTherapy(10552) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"n%2F%28n-3%29%2Bn=%287n-18%29%2F%28n-3%29\"$
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\n" ); document.write( "x LCD (n – 3)
\n" ); document.write( "n + n(n – 3) = 7n - 18
\n" ); document.write( " $\"n%2Bn%5E2-3n=7n-18\"$
\n" ); document.write( " $\"n%5E2-9n%2B18=0\"$
\n" ); document.write( "(n – 6)(n – 3) = 0\r
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\n" ); document.write( "\n" ); document.write( "n = 6 or 3\r
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\n" ); document.write( "\n" ); document.write( "Since n = 3 makes the two fractions undefined, this value cannot be used, so the only answer is n = 6.
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