若(x-3):(y+4):(2 z+3)=2:3:5 且3x-2y+z=23.则x:y:z=______
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化简-(-3x-y+2z)-{-x+【4x-(x-y-z)-3x+2z}
若x:y:z=2:3:4,求x+y+z/x-2y+3z的值
若x/2=y/3=z/4,则3x-2y+5z/x+y+z=
若x/3=y/4=z/5,求x+y+z/3x-2y+z的值.
若x+2y-4z=0 3x+y-z=0 求x:y:z
若x/2=y/3=z/4不等于0,求x+y+z/x+y-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
数学--整式运算4(x-y+z)-2(x+y-z)-3(-x-y-z)
若xyz≠0且4(x/z)-5(y/z)=-2,(x/z)+4(y/z)=3,求x:y:z
若(4x-3y-3z)^2+|x-3y-z|=0 且xyz不等于0 则4x+y-z/x+y+z 的值
若X Y Z 满足方程组 X-2Y+3Z=0 2X-3Y+4Z=0 则 X:Y:Z =?
若4x-3y-6z=0,x+2y-7z=0,则x+y+z/3x-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.
求化简(x+3y+2z)(x-3y+6z)(x+3y+4z-2z)(x-3y+4z+2z)
若x/2=y/3=z/4,则x+y+z/x=多少?
因式分解Z^2(x-y)-4(x-y)-3Z(y-z)