解方程 Y=X+Z Y-Z=2 100Z+10Y+X-(100X+10Y+Z)=99
解一道三元一次方程x+y+z=13,y-2=z,100z+10y+x+99=100x+10z+y.
(x+y-z)(x-y+z)=
解三元一次方程组,100x+10y+z=27(x+y+z) {x+y-z=1 (100z+10y+x)-(100x+10
100x+10y+z=27(x+y+z) x+z=y+1 100z+10y+x-100x-10y-z=99 解方程组
x+y+z=30 解方程:120x=3*200z 100y=2*200z
X+Y+Z=?
若{x+3y+10z=0 则 (x+y-z)/(x-y+z)
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
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
3x-y+z=3 2x+y-3z=11 x+y+z=12 解方程
100x+10y+z=48(x+Y+Z) x+Z=y+3 100x+10y+z-(100z+10y+x)=198 怎么解