已知x/3=y/5=z/7不等于0,则x-y+z/y=?
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/3=y/5=z/7不等于0,则2x+3y+4z/5x-3y+z=?
已知:(x+y)/z=(x+z)/y=(z+y)/x,且xyz不等于0,则分式(x+y)(x+z)(z+x)/xyz的值
已知x+y-7z=0 x-2y+5z=0(xyz不等于0),求x+2y-z/y-2x+12z
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4x-3y-3z=x-3y+z=0(x、y、z不等于0)
如果x/2=y/7=z/5,x,y,z都不等于0,则(x+y+z)/(3x-y)等于多少?
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xy/5=y+z/6=z+x/7,且xyz不等于0,求x:y:z
已知x+4y-3z=0,4x-5y+2z=0(xyz不等于0),则x:y:z=?