灵鹊做题网方程：X+2Y+3Z=11 x-Y+4Z=10 X+3Y+2Z=2
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
3x-y+z=3 2x+y-3z=11 x+y+z=12 解方程
解方程：{2x+3y+z=7,x+y+z=4,3x+y-z=-4
解方程{3x -y+z=4 2x+3y-z=12 x+y+z=6
x=y/z=z/3,x+y+z ＝12,求2x+3y+4z是多少,
x/2=y/3=z/5 x+3y-z/x-3y+z
方程：X+2Y+3Z=11 x-Y+4Z=10 X+3Y+2Z=2
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai
x+2y+3z=10,x-y+4z=10,x+3y+2z=2
x+2y+4z=17 2x+y+z=7 3x+y+2z=11
x-y+4z=10,x+3y+2z=2,x+2y+3z=11.
x+y+z=4 2x+3y-z=6 3x+2y+2z=10