已知x/1=y/3=z/5(x不等于0),求(x+3y-z)/(x-3y+2z)的值.
已知x/2=y/3=z/4,且x+y+z不等于0,求2x+3y-4z/x+y+z的值
已知4x-3y+z=0,x+2y-8z=0,xyz不等于0,求x+y-z/x-y+2z的值
已知x/1=y/3=z/5(x不等于0),求(x+3y-z)/(x-3y+2z)的值.
已知x,y,z满足{4x-3y-3z=0,x-3y+z=0.(x不等于0,y不等于0,z不等于0)求x/z和y/z的值
已知x=y/3=z/5.且x+y-2z不等于0.求2x+3y-z/x+y-2z的值是多少
若x/2=y/3=z/4不等于0,求x+y+z/x+y-z的值
已知x=3y,z=7x(x不等于0),求代数式2x+3y-z分之x+y+z的值
已知x-4y=0,z=5x(x不等于0),求代数式x-14y+3z/x+y+z的值
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?
4x-3y-3z=0 x-3y+z=0 并且X Y Z不等于0 求x:z 和y:z的值
已知X Y Z满足3x-2y+z的绝对值+2x+y+2z的绝对值=0(x,y,z不等于0),求x+y除以Z的值
已知x::y:z=3:4:5,(1)求x+y分之z的值;(2)若x+y+z=6,求x,y,z.