x+2y+3z=2 (1)3x+y+2z=3 (2)2x+3y+z=4 (3)(2)×2-(1)5x+z=4 z=4-5x(2)×3-(1)×27x-y=5 y=7x-5y=7x-5 z=4-5x代入(3)2x+3(7x-5)+(4-5x)=4,整理,得18x=15x=5/6y=7x-5=35/6 -5=5/6z=4-5x=4-25/6=-1/6x=5/6 y=5/6 z=-1/6...