解此三元一次方程组 2x+3y+z=38 (1) 3x+4y+2z=56 (2) 4x+5y+z=66
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![解此三元一次方程组 2x+3y+z=38 (1) 3x+4y+2z=56 (2) 4x+5y+z=66](/uploads/image/z/74603-11-3.jpg?t=%E8%A7%A3%E6%AD%A4%E4%B8%89%E5%85%83%E4%B8%80%E6%AC%A1%E6%96%B9%E7%A8%8B%E7%BB%84+2x%2B3y%2Bz%3D38+%EF%BC%881%EF%BC%89+3x%2B4y%2B2z%3D56+%EF%BC%882%EF%BC%89+4x%2B5y%2Bz%3D66)
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