如果 x-y/3 = 2y-z/4 = 2z+x/5 = 1,求x\y\z的值.

如果x:y=2:3,y:z=4:3,则x:y:z= 如果x:y=3:2,y:Z=4：2,那么x：y：Z= 如果x/2=y/3=z/4,且x+y+z=18,那么x+y-z=? 如果x/2=y/3=z/4,求(2x-y+3z)/(x+y-z)的值 如果|x+y+z-6|+|2x+3y-z-12|+|2x-y-z|=0求x,y, 如果,根号x-3+| y-2 |+z^2=2z-1 求 （x+z)^y 如果y:z=5:2,y:x=3:4,求x:y: x+y/2=z+x/3=y+z/4 x+y+z=27 x+2y=3x+2z=4y+z 求x:y:z 如果x=3y,z=x/2,那么(x-y+z)/(x+y+z)=多少? 如果x+4/3=y+z/2=z+8/4,且x+y+z=12,求x,y,z的值. 如果3/x=4/y=5/z,则（x+y+z）/（x-y-z）= 如果2x-3y=z x+3y-14z=0 求x:y:z 快, 如果X/2=Y/3=Z/4,那么(2X-Y+3X)/(X+Y-Z)=________.是（2x-y+3z）/（x+y-z） (4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=? 设|x|-|y|+|z|=|x+y+z|,且|x+y|=4,|y+z|=5,|y|=3,求(x-y-z)^2的值 已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z 试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)