document.write( "Question 1056499: twice a sum of a number and six is the opposite of the number. what is the number?
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Algebra.Com's Answer #671618 by Edwin McCravy(20055)\"\" \"About 
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twice
2*
a sum of a number and six
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(x + 6)
is
=
the opposite of the number.
-x\r\n" );
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document.write( "So we have\r\n" );
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document.write( "2*(x + 6) = -x\r\n" );
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document.write( "2*x + 2*6 = -x\r\n" );
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document.write( " 2*x + 12 = -x\r\n" );
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document.write( "Subtract 12 from both sides:\r\n" );
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document.write( "      2*x = -x - 12\r\n" );
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document.write( "Add x to both sides:\r\n" );
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document.write( "      3*x = -12\r\n" );
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document.write( "Divide both sides by 3\r\n" );
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document.write( "        x = -4\r\n" );
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document.write( "Edwin
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