若X/10=Y/11=Z/12(x≠0),则(3X+2Y-4Z)/(5X-6Y)=?请各位大哥大姐教教我啊
若4x-3y-6z=0,x+2y-7z=0,求代数式5x*5x+2y*2y-z*z/2x*2x-3y*3y-10z*10
若{x+3y+10z=0 则 (x+y-z)/(x-y+z)
如果|x+y+z-6|+|2x+3y-z-12|+|2x-y-z|=0求x,y,
若3x+7y+z=5,4x+10y+z=3,则x+y+z=?
2x+5y+4z=0,3x+y-7z=0,则x+y-z=?
{2x+3y-4z=-5 x+y+z=6 x-y+3z=10
已知方程组4x-5y+2z=0 x+2y=3z 则x:y:z
①x+y+z=6 3x-y+2z=12 x-y-3z=-4 ②x+y-z=2 4x-2y+3y+8=0 x+3y-2z-
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai
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,方程组:4x-3y-7z=0 x+2y=10z 则(x-y+z)÷(x+y+z)=——
2x+3y-4z=0.,3x+4y+5z=0,则x+y+z/x-y+z详细的解题过程