如果|x+y+z-6|+|2x+3y-z-12|+|2x-y-z|=0求x,y,

如果|x+y+z-6|+|2x+3y-z-12|+|2x-y-z|=0求x,y, 2(x+y-z)-3(x-y+z)-5(x+y-z)+6(x-y+z) 计算 如果,根号x-3+| y-2 |+z^2=2z-1 求 （x+z)^y 求化简(x+3y+2z)(x-3y+6z)(x+3y+4z-2z)(x-3y+4z+2z) x+y+z=6 x+2y+3z=14 y+1=z 如果x=3y,z=x/2,那么(x-y+z)/(x+y+z)=多少? 2x-{3z-[3x-2(z-y)-(x+8y-6z)]} 试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y) 已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z 如果x/2=y/3=z/4,求(2x-y+3z)/(x+y-z)的值 如果2x-3y=z x+3y-14z=0 求x:y:z 快, 如果x/2=y/3=z/4,且x+y+z=18,那么x+y-z=? 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= 2(x+y)(x+y-z)+3(y-z)(x+y-z) 3x-y+z=4,2z+3y-z=12,x+y+z=6的解 如果x=3y y=6z ,那麼x+2y+3z的值为? (x-3y+2z)(x+3y-2z)