已知x/3=y/5=z/7不等于0,求x-y+z/y的值
已知5分之X+Y=6分之Y+Z=7分之x+z,且X,Y,Z都不等于0,求X:Y:Z的值
已知x/3=y/5=z/7不等于0,求x-y+z/y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xyz不等于0,且x+2y-z=0,7x-y-z=0,求x+y+z/2x-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/2=y/3=z/4,且x+y+z不等于0,求2x+3y-4z/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
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/z=x-y+z/y=-x+y+z/x,且xyz不等于0,求分式[(x+y)(x+z)(y+z)]/xyz
已知x yz不等于0且x+3y+z=0 2x+3y-z=0求3x+5y+z分之x+2y-7z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?