若-x/2=y/3=z/4=3则3x+4y+6z的值为

若x/2=y/3=z/4,则3x-2y+5z/x+y+z= 若x/2=y/3=z/4,则x+y+z/x=多少? 若4x-3y-6z=0,x+2y-7z=0,则x+y+z/3x-y+z=? 若(4x-3y-3z)^2+|x-3y-z|=0 且xyz不等于0 则4x+y-z/x+y+z 的值 若x+y+z=3y=2z,则x/x+y+z=? x+y/2=z+x/3=y+z/4 x+y+z=27 x+2y=3x+2z=4y+z 求x:y:z x/2=y/3=z/4,则x+2y-z/z=? 若x/2=y/3=z/4则3x-2y+5z/x+y+x= 2x+z=10 x+y-z=4 3x-y-z=0 已知：4x-5y+2z=0 x+4y-3z=0则：(x*x+y*y+z*z)/(x*y+y*z+z*x)=____. 若x/2=y/3=z/4 则2x+3y/z 等于? 若{x-3y+z=0,3x+3y-4z=0,则x:y:z=? 已知(x+2y)/2=(y+3z)/3=(z+4x)/4,则x:y:z=? 若3x+7y+z=5,4x+10y+z=3,则x+y+z=? 已知x/2=y/3=z/4,则2x+y-z/3x-2y+z=? x+2y+3z=10,4x+3y+2z=15则x+y+z= 2x+y+3z=10,3x+4y+2z=15,则x+y+z=