3元一次方程2x-y+z=4 2x+3y-z=12 x+y+z=6
怎么做3元一次方程2x+3y+z=6x-y+2z=1x+2y-z=5
x/2=y/3=z/4 x+2y+3z=80 解3元一次方程
解三元一次方程:3x-y+z=4 2x+3y-z=12 x+y+z=6
3元一次方程怎么解 如 2x+y+3z=23 x+4y+5z=36
解几个3元一次方程,1、x+y+z=3.3 2 3x-y+z=3 3 5x-4y+4z=1320x+15y+12z=51
解3元一次方程 2y-3=x 2y=3z x+y+z=41
三元一次方程4X+3Y+2Z=40 3X+2Y+5Z=22 6Z-5Y+3Z=50急
解三元一次方程:x+y-z=0,2x+y+z=7,x-3y+z=8
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
如果|x+y+z-6|+|2x+3y-z-12|+|2x-y-z|=0求x,y,
1.x+y=16,y+z=12,z+x=102.3x-y+z=4,2x+3y-z=12,x+y+z=63.x+y+z=6