1式*3+2式*2 有-10y+7z=0 有y=7z/10 代入2式有x=47z/30 则x/y/z=(47z/30 )/(7z/10)/z=47/21/30
已知2x-4y-5z=0,-3x+y+4z=0 (xyz≠0)则x/y/z=?
1个回答
相关问题
-
已知2x-4y-5z=0,-3x+y+4z=0,(xyz≠0)则x:y:z=________
-
已知x+4y-3z=0 4x-5y+2z=0(xyz≠0) 则x:(-2x):3y 为________.
-
已知3x-4y-z=0.2x+y-z=0,且xyz=0,求x+2y-3z/3x-2y+3z
-
已知xyz满足x-2y+3z=0,2x-3y+4z=0,求x:y:z
-
从方程组4x-3y-3z=0,x-3y+z=0(xyz≠0),则x:z=__,y:z+___
-
已知方程组﹛x+4y-3z=0 4x-5y+2z=0 ,xyz≠0,求﹙3x²+2xy+z²﹚÷﹙x
-
已知2X+5Y+4Z=0,3X+Y-7Z=0,且XYZ不等于0,求(X+Y+Z)/(2X-3Y+4Z)的值
-
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
-
若4x-3y-6z=0,x+2y-7z=0(xyz≠0),则x:y:z=______.
-
若4x-3y-6z=0,x+2y-7z=0(xyz≠0),则x:y:z=______.