document.write( "Question 1097901: 5x+8y-z=36
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document.write( "x-2y+7z=18
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document.write( "3x+y+z=21 \n" );
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Algebra.Com's Answer #712396 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! I would use eliminataion. \n" ); document.write( "--- \n" ); document.write( "Eliminate z first. \n" ); document.write( "Add the 1st and 3rd equations. \n" ); document.write( "--- \n" ); document.write( "then, multiply eqn 1 by 7 and add to eqn 2. \n" ); document.write( "No more z \n" ); document.write( "--------- \n" ); document.write( "Actually, I have an Excel sheet I made that does these. \n" ); document.write( "----- \n" ); document.write( " \n" ); document.write( " |