document.write( "Question 715196: x-2y+3z=11
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document.write( "4x+2y-3z=4
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document.write( "3x+3y-z=4
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document.write( " Using equations 1 and 2, and 1 and 3, elimiate x first and solve. \r
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document.write( "I can elimiate the x, but once i get to the equation
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document.write( "10y-15z=-40
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document.write( "9y-10z=-29\r
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document.write( "I get stumped. I know the solution is (3,-1,2) But I cannot get it to work. Please help by walking me though it.
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document.write( "Thanks! \n" );
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Algebra.Com's Answer #439279 by josmiceli(19441)![]() ![]() You can put this solution on YOUR website! (1) \n" ); document.write( "(2) \n" ); document.write( "(3) \n" ); document.write( "Add equations (1) and (2) \n" ); document.write( "(1) \n" ); document.write( "(2) \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "Plug this result into both (2) and (3) \n" ); document.write( "(2) \n" ); document.write( "(3) \n" ); document.write( "---------------------- \n" ); document.write( "(2) \n" ); document.write( "(3) \n" ); document.write( "-------------------- \n" ); document.write( "(2) \n" ); document.write( "(3) \n" ); document.write( "----------------- \n" ); document.write( "Multiply both sides of (3) by \n" ); document.write( "and add (2) and (3) \n" ); document.write( "(2) \n" ); document.write( "(3) \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "---------- \n" ); document.write( "Plug this result into (2) or (3) \n" ); document.write( "(2) \n" ); document.write( "(2) \n" ); document.write( "(2) \n" ); document.write( "(2) \n" ); document.write( "(2) \n" ); document.write( "-------------- \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |