解方程组 4x-5y+2z=0x+4y=3z则x:y:z=( )
已知方程组4x-5y+2z=0 x+2y=3z 则x:y:z
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
已知方程组4x-y+3z=0 2x+y+6z=0且xyz不等于0,则x/y+y/z+z/x是多少
已知,方程组:4x-3y-7z=0 x+2y=10z 则(x-y+z)÷(x+y+z)=——
解方程组{3x+y-z=4,2x-y+3z=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.
已知x,y,z满足方程组:4x-5y+2z=o;x+4y-3x=0,求x:y:z的值
方程组:x-2y+4z=0,2x+3y-3z=0...xyz不等于0,求(2x+y-z)\(2x-y+z)
已知x.y.z满足方程组x+2y-4z=0 2x+y-5z=0 求x:y:z的值
4x-3y-6z=0,x+2y-7z=0是一个方程组,那么x-y+z/x+y+z的值等于
方程组{4x-3y-3z=0,x-3y+z=0,(x.y.z不等于0),求x/z和y/z的值?