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