若x+9/y=3,y+1/z=3,则z+1/x的值为

若x+y+z=3y=2z,则x/x+y+z=? X/10=Y/8=Z/9,则X+Y+Z/2Y-3Z 若|x+3|+|y-2|+|2×z+1|=0求(x×z-y×z)(y-x+z)的值 若x:y:z=3:2:1,则x+2y-z/2x-y+z= 若X/10=Y/8=Z/9则X+Y+Z/Y+Z=? x+y+z=6 x+2y+3z=14 y+1=z 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x-y/x+y=y+z/2(y-z)=z+x/3(z-x),求证8x+9y+5z=0THX.. 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+y)/z=(y+z)/x=(x+z)/y 求（x+y-z)/(x+y+3z)的值 若{x-3y+z=0,3x+3y-4z=0,则x:y:z=? 若3x+7y+z=5,4x+10y+z=3,则x+y+z=? 若方程组2x+3y-z=0,x-3y-z=0,则x：y：z=? 若x/2=y/3=z/4,则3x-2y+5z/x+y+z= 若x/3=y/2=z/5,则2x-3y-z/x-y+z= x+y=3 y+z=-2 z+x=9则x+y+z的值为? 若2x=3y=5z,则3x-2y+z/x+y-z