已知x/2=y/3=z/4,xyz≠0,求3x/2x+3y-5z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,xyz≠0,求3x/2x+3y-5z的值.
已知方程组{2X-Y+3Z=0,X-3Y+Z=0(XYZ≠0),求3Y分之4X+2Z的值
已知xyz满足方程组x+4y-3z=0,求x:y:z的值 4x-5y+2z=0
设X+Y+Z=0求X^3+X^2Z-XYZ+Y^2Z+Y^3的值
已知{4x-5y 2z=0/x 4y-3x=0(xyz不等于0),求x:y:z:d的值
已知x+y+z=0,求多项式x^3+x^2z-xyz+y^3的值
已知有理数x,y,z满足(x-z-2)^2+(3x-6y-7)^2+|3y+3z-4|=0求xyz的值
比例线段的问题,已知x/2=y/3=z/4,xyz≠0,求x+3y-2z/2x+y的值
已知,2分之x=3分之y=4分之z,xyz≠0,求2x+y分之x+3y-2z的值
已知xyz≠0,且x+3y+z=0,2x+3y-z=0 ,求x+2y-7z /3x+5y+z的值?
已知3/x+y=4/x+y=5/y+z,求xyz/(x+y)(y+z)(z+x)的值