document.write( "Question 1127839: Solve the system of equation x+y+z=9, -x+y+z=1, and x-y-z=5\r
\n" ); document.write( "\n" ); document.write( "A. There is no solution.
\n" ); document.write( "B. There are infinitely many solutions.
\n" ); document.write( "C. There is one solution, x=4, y=2, and z=3.
\n" ); document.write( "D. There is not enough information to solve the problem
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Algebra.Com's Answer #744322 by ikleyn(52781)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "You can easily solve the problem and answer the question MENTALLY,  without writing any equations.\r
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\n" ); document.write( "\n" ); document.write( "Simply notice that the second and the third equations have their left sides with opposite signs;
\n" ); document.write( "but the right sides are not the opposite numbers.\r
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\n" ); document.write( "\n" ); document.write( "Hence,  the system HAS NO solution.\r
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