若4x-3y-6z=0,x+2y-7y=0(xyz≠0),则(5x²+2y²-z²)÷(2
若4x-3y-6z=0,x+2y-7z=0(xyz≠0),则x:y:z=______.
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-2y+z=0,3x+6y-z=0(xyz≠0),求2x²+y²/x²+y²
若4x-3y-6z=0,x+2y-7z=0(xyz≠),求代数式5x²+2y²-z²/2x
已知2x-4y-5z=0,-3x+y+4z=0,(xyz≠0)则x:y:z=________
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=?
若x+2y-9z=0,z-3y-5z=0,(xyz≠0)求:x²-4y²+9z²分之(2x
已知x+y-7z=0 x-2y+5z=0(xyz不等于0),求x+2y-z/y-2x+12z
若4x-3y-6z=0,x+2y-7z=0且xyz≠0; 求(2x+3y+6z)/(x+5y+7z)的值?
x*x+y*y+2z*z-2x+4y+4z+7=0,求xyz的值
1.若4x-3y-6z=o,x=2y-7z=0 (xyz ≠0)则 、(5x的平方+2y的平方-z的平方) 除以 (2x