document.write( "Question 228736: What is 2x-y+z=14
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document.write( "-x+2y-4z=5
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document.write( " x+4y-6z=-1
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document.write( "This is solve the system using the elimination method get the x,y, and z please help this is hard. \n" );
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Algebra.Com's Answer #169791 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! 2x - y + z = 14 \n" ); document.write( "-x+ 2y -4z = 5 \n" ); document.write( "x + 4y -6z =-1 \n" ); document.write( ": \n" ); document.write( "You're right this is a pain! \n" ); document.write( ": \n" ); document.write( "Add the 2nd and 3rd equations, to eliminate x \n" ); document.write( "-x+ 2y -4z = 5 \n" ); document.write( "x + 4y -6z =-1 \n" ); document.write( "-----------------adding eliminates x \n" ); document.write( "0 + 6y - 10z = 4 \n" ); document.write( "Simplify, divide by 2 \n" ); document.write( "3y - 5z = 2 \n" ); document.write( ": \n" ); document.write( "Multiply the 2nd equation by 2 and add to the 1st equation \n" ); document.write( "2x - y + z = 14 \n" ); document.write( "-2x+ 4y -8z = 10 \n" ); document.write( "-----------------addition eliminates x again \n" ); document.write( "0 + 3y - 7z = 24 \n" ); document.write( ": \n" ); document.write( "Two 2 unknown equation to deal with now \n" ); document.write( ": \n" ); document.write( "Subtract 3y - 5z = 2 from the above equation \n" ); document.write( "3y - 7z = 24 \n" ); document.write( "3y - 5z = 2 \n" ); document.write( "---------------subtraction eliminates y, find z \n" ); document.write( "0 - 2z = 22 \n" ); document.write( "-2z = 22 \n" ); document.write( "z = \n" ); document.write( "z = -11 \n" ); document.write( ": \n" ); document.write( "find y using the equation 3y - 5z = 2 \n" ); document.write( "3y - 5(-11) = 2 \n" ); document.write( "3y + 55 = 2 \n" ); document.write( "3y = 2 - 55 \n" ); document.write( "3y = -53 \n" ); document.write( "y = \n" ); document.write( "y = -17.667 \n" ); document.write( ": \n" ); document.write( "Find x using the 1st equation 2x - y + z = 14 \n" ); document.write( "2x - (-17 \n" ); document.write( "2x + 17 \n" ); document.write( "2x + 6 \n" ); document.write( "2x = 14 - 6.667; go to decimals here \n" ); document.write( "2x = 7.333 \n" ); document.write( "x = 3.667 \n" ); document.write( "; \n" ); document.write( ": \n" ); document.write( "It's kind of disgusting they give you a problem that doesn't have integer solutions. \n" ); document.write( " I checked this using the matrix feature on my TI83, so I think it's right \n" ); document.write( " \n" ); document.write( " |