｛x-y=8 x+y+z=3 2x-y+z=14（过程）

试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y) (x+y-z)(x-y+z)= x+y-z=6 x-3y+2z=0 3x+2y-z=0 求x、y、z 要过程 x/2=y/3=z/5 x+3y-z/x-3y+z 2x+3y-4z=0.,3x+4y+5z=0,则x+y+z/x-y+z详细的解题过程 (4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai （1）3x+4z=7;2x+3y+z=9;5x-9y+7z=8 (2)3x+4y+z=14;x+5y+2z=17;2x+ x+y+z=18,8x+6y+6z=118,2y+z=20求解过程 x分之y+z=y分之z+x=z分之x+y(x+y+z不等于0）,求x+y+z分之x+y-z X+Y+Z=? x+y+z=20,3x+2y+z=50过程谢谢 {x+y+z=1;x+3y+7z=-1;z+5y+8z=-2