document.write( "Question 1023817: Solve the system by elimination.
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document.write( "4r-4s+4t=-4
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document.write( "4r+s-2t=5
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document.write( "-3r-3s-4t=-16 \n" );
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Algebra.Com's Answer #639386 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! Similar problem, different numbers. \n" ); document.write( "=================================== \n" ); document.write( "Solve the system by elimination. \n" ); document.write( "-4x-5y-z=18 \n" ); document.write( "-2x-5y-2z=12 \n" ); document.write( "-2x+5y+2z=4 \n" ); document.write( "------------- \n" ); document.write( "Pick a variable to eliminate 1st. \n" ); document.write( "All y terms have the same coefficient 5: \n" ); document.write( "--- \n" ); document.write( "-4x-5y-z=18 \n" ); document.write( "-2x-5y-2z=12 \n" ); document.write( "------------------ Subtract \n" ); document.write( "-2x + z = 6 Eqn A \n" ); document.write( "--- \n" ); document.write( "-2x-5y-2z=12 \n" ); document.write( "-2x+5y+2z=4 \n" ); document.write( "--------------------- Add \n" ); document.write( "-4x = 16 \n" ); document.write( "--> x = -4 ************ \n" ); document.write( "--- \n" ); document.write( "-2x + z = 6 Eqn A \n" ); document.write( "--> z = -2 ************ \n" ); document.write( "--- \n" ); document.write( "-2x+5y+2z=4 \n" ); document.write( "--> y = 0 ************* \n" ); document.write( "==================== \n" ); document.write( "(-4,0,-2) \n" ); document.write( " \n" ); document.write( " |