若1/x+2/y+z/3=4,3/x+2/y+1/z=6.则1/x+1/y+1/z=

已知x:：y：z=3：4：5,(1)求x+y分之z的值；（2）若x+y+z=6,求x,y,z. 若|x+3|+|y-2|+|2×z+1|=0求(x×z-y×z)(y-x+z)的值 若x+y+z=3y=2z,则x/x+y+z=? x+2y=3x+2z=4y+z 求x:y:z x+y/2=z+x/3=y+z/4 x+y+z=27 若有理数x,y,z满足（x-1)^2+(2x-y)^4+(x-3z)^2=2,求x+y+z的值 若有理数x、y、z满足等式(x-1)^2+(2x-y)^4+|x-3z|=0,求x、y、z的值 三元一次方程组题目x+y-z=11 y+z-x=5 x-y+z=1x+y=4 y+z=3 x+z=5若已知x-3y+2z=0 2x+3y-8z=0, 且xyz≠0,则x:y:z= 已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值 已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值 若x/2=y/3=z/4,则3x-2y+5z/x+y+z= 4x+y+z=-3 2x+3y-4z=-10 x+2y-z=-1 x-y-z=1 2x+y-3z=4 3x-2y-z=-1 若x:y:z=2:3:4,求x+y+z/x-2y+3z的值 x+y+z=2 4x+2y+z=4 2x+3y+z=1 若xyz=1,求证 x^2/(y+z)+y^2/(z+x)+z^2/(x+y)≥3/2 若x:y:z=3:2:1,则x+2y-z/2x-y+z= 若x/3=y/4=z/5,求x+y+z/3x-2y+z的值.