x+y+z=22,3x+y=47,x=4z+2怎么解
x+y+z=22,3x+y=47,x=4z+2怎么解
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
解方程组:{x/2=y/3=z/4 2x+y+z=22
解方程组{6x=4y=3z,2x+y+z=22
解方程组x:y:z=2:3:4;2x+y+z=22
解方程:{2x+3y+z=7,x+y+z=4,3x+y-z=-4
解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6}
解方程{3x -y+z=4 2x+3y-z=12 x+y+z=6
解方程组x-4y+z=-3,2x+y-z=18,x-y-z=7.
x+y/2=z+x/3+y=z/4,...x+y+z=27.解方程组.
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,