3X-y+z=3﹛2x+y-3z=11﹛x+y+z=12 3元1次方程.
3X-y+z=3﹛2x+y-3z=11﹛x+y+z=12 3元1次方程.
3元1次方程x-2y=-9 3x-y+z=4{ y-z=3 { 2x+3y-z=122z+x=47 x+y+z=6
3元1次方程x/2=y/3=z/5 3x-y+2z=26
3元1次方程x+y=-1①y+z=2②x+z=3③
已知X:Y=1:3,Y:Z=5:4 (1)求X:Y:Z (2)如果X+Y+Z=96,求X,Y,Z的值 3元1次方程
3x-y+z=3 2x+y-3z=11 x+y+z=12 解方程
3元1次方程怎么算第一题:2x+y+z=10 x+2y+z=-6 x+y+2z=8 第2题 :5x+4y-3z=13 2
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{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
解3元1次方程组如下; 4X-9Z=17 3X+Y+15Z=18 X+2Y+3Z=2