已知x,y,z满足x+2y-4z=0,2x+5y-3z=0,且xyz≠0,则x:y:z等于

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：(x+y-z)/z=(x-y+z)/y+(y+z-x)/x,且xyz≠0,求代数式[(x+y)(y+z)(x+z) 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+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 若xyz不等于0,且满足(y+z)/x=(x+z)/y=(x+y)/z,求（y+z)（x+z)（x+y)/xyz的值 已知xyz满足方程组x+4y-3z=0,求x：y：z的值 4x-5y+2z=0 已知有理数x,y,z满足条件：|x-z-2|+|3x-6y-7|+（3y+3z-4）^2=0,则xyz=? 已知有理数x,y,z满足(x-z-2)²+(3x-6y-7)+|3y+3z-4|=0,则xyz= 已知XYZ满足方程组 X+Y-Z=6 Y+Z-X=2 Z+X-y=0 求X Y Z的值 已知2x-4y-5z=0,-3x+y+4z=0 (xyz≠0)则x/y/z=? 已知2x-4y-5z=0,-3x+y+4z=0,（xyz≠0）则x：y:z=________ 已知方程组4x-y+3z=0,2x+y+6z=0.且xyz不等于0,则x:y:z=