已知xyz满足2/x=3/(y-z)=5/(y+z),则 (5x-y)/(y+2z)的值为?

已知xyz满足|3x-2y+z|+|2x+y+2z|=0（xyz不等于o）求x+y除以z 已知xyz满足2/x=3/(y-z)=5/(y+z),则 (5x-y)/(y+2z)的值为? 已知xyz满足方程组x+4y-3z=0,求x：y：z的值 4x-5y+2z=0 已知实数xyz满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3求x+y+z的值 正数XYZ满足(X+Y)(X+Z)=2则XYZ(X+Y+Z)最大值 已知XYZ满足(X-Z-2)的平方+(3X-6Y-7)的平方+3Y+3Z-4的绝对值=0,则xyz= 已知有理数xyz 满足|x-z-2|+（3x-6y-7)的二次方+|3y+3z-4|=0 ,求xyz的值. 已知实数xyz满足x+y=5 z的平方=xy+y-9那么x+2y+3z=多少 已知实数xyz满足x+y=5 z的平方=xy+y-9那么x+2y+3z=多少 已知XYZ是三个非负数有理数,且满足3X+2Y+Z=5,X+Y-Z=2.则X的取值范围是多少? 已知xyz满足方程(x-3)^2+(y-4)^2+(z-5)^2=2,则x^2+y^2+z^2的最小值为? 已知有理数x.y.z满足（x-z-2)^2+(3x-6y-7)^2=/3y+3z-4/=0求xyz=多少 已知x,y,z同时满足2x-3y=8,3y+2z=0,x-z=-2,试求xyz的值 已知,x,y,z同时满足2x+3y=8,9y+2z=0,x-z=-2,求xyz的值 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xyz满足x-2y+3z=0,2x-3y+4z=0,求x:y:z 已知xyz满足x-2y+3z=0,2x-3y+4z=0,求x:y:z 数学已知xyz满足x-2y+3z=0,2x+3y+4z=0,求x:y:z