已知X:Y=0.3:1/2,Y:Z=2:3,求X:Y:Z
已知x:y:z=1:2:3,x+y+z=24,求x,y,z
已知{x:y:z=1:2:3,x+y+z=12,求x、y、z的值
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x:y:z=4:5:7,求:(1)2x+3y+z/5z; (2)x+y/y+z.
已知x/2=y/3=z/4,求下列各式 (1)(x+y+z)/x (2)(x-y+2x/(x-y-2z)
已知3x=4y,2y=5z,试求x:y:z
1.已知x,y,z满足2│x-y│+(根号2y-z)+z平方-z+(1/4)=0,求x,y,z值.
已知x、y、z满足方程组:x+y-z=6;y+z-x=2;z+x-y=0 求x、y、z的值
已知3x=4Y,5Y=6Z,求 (1)x:y:z;(2)x+y/y+z.
已知3x=4Y,5Y=6Z,求 (1)x:y:z;(2)x+y/y+z
已知x/3=y/4=z/2,求x+2y-z/x+y+z=?
已知 3x-y+2z=0 2x+y-3z=0,求x :y :z.