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![三元一次方程组及其解法 3x-5y+2z=1 4x+5y-z=51)9x-5y+z=5 (2)3x-5y+2z=1 9x+y+4x=14 4x+5y-z=5 -9x+3y-5z=-11 x-5y+3z=-2 (3)4x+3y-2z=-7 (4)5x-3y+6z=-3 5x-6y](/uploads/image/z/1992330-18-0.jpg?t=%E4%B8%89%E5%85%83%E4%B8%80%E6%AC%A1%E6%96%B9%E7%A8%8B%E7%BB%84%E5%8F%8A%E5%85%B6%E8%A7%A3%E6%B3%95+3x-5y%2B2z%3D1+4x%2B5y-z%3D51%299x-5y%2Bz%3D5+++++++++++++++%282%293x-5y%2B2z%3D1+++9x%2By%2B4x%3D14+++++++++++++++++4x%2B5y-z%3D5+++-9x%2B3y-5z%3D-11++++++++++++++x-5y%2B3z%3D-2+++++++++++++++++++++++++++++%283%294x%2B3y-2z%3D-7+++++++++++++%284%295x-3y%2B6z%3D-3+++5x-6y)
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