已知x:y=0.5:1/3,y:z=6/5:3/5,求x:y:z

已知x:y=3:5 y:z=6:1,求x:y:z( ):( ):( ) 已知 x/(y+z)+y/(z+x)+z/(x+y)=1求 (x*x)/(y+z)+(y*y)/(x+z)+(z*z)/(x+y)=? 已知x:y=0.5:1/3,y:z=6/5:3/5,求x:y:z 已知x:y=1又1/3:5/6,z:y=0.4:0.5,求x:y:z 已知x：y=1又1/3：5/6,y：z=0.5：0.4,求x:y: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. 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 已知3X=4X,5Y=6Z求X+Y：Y+Z 已知3x=4Y,5Y=6Z,求 (1)x:y:z;（2）x+y/y+z.请说明道理， 已知3x=4Y,5Y=6Z,求 (1)x:y:z;(2)x+y/y+z 已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z 已知x:y=3:6,y:z=8:5求x:y:z 已知X：Y=0.3：1/2,Y：Z=2：3,求X：Y：Z 已知x+2y-3z=0,5x-6y+7z=1;则x:y:z=?把“5z-6y+7z=1”改成“5x-6y+7z=0” 已知x-2y=3,x-y+z=4,x+6y+2z=-1,求x,y,z分别为多少? 已知x+y+z=0求证x*x*x+y*y*y+z*z*z=3xyz x+y+z=6 x+2y+3z=14 y+1=z