若 x/2 = y/2 = z/4 ≠0,则2x+3y/z的值为
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若xyz≠0且4(x/z)-5(y/z)=-2,(x/z)+4(y/z)=3,求x:y: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=
若z≠0,且4x=7y+5z,2x+y=z,求x,y,z的值
若x,y,z成等差数列,则(z-x)^2-4(x-y)(y-z)=
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若实数XYZ满足2|x-y|+√2y+z+z方-z+1//4=0 求X+Y+Z 2y+z在根号里
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若(z-x)^2-4(x-y)(y-Z)=0,试说明x-2y+z=0.
若x/2=y/3=z/4不等于0,求x+y+z/x+y-z的值
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已知方程组4x-3y-2z=0,x-3y+z=0,z≠0求x/z,y/z的值
若(x-z)^2-4(x-y)(y-z)=0,求x+z与y的关系
若x+y+z≠0且2y+z/x=2x+y/z=2z+x/y=k,则k=?
设z≠0 x、y、z 满足4x-7y-5z=0 2x-y-z=0 求x:y
设z≠0,x、y、z满足4x-7y-5z=0、2x-y-z=0,求x:y
若4x-3y-6z=0,x+2y-7z=0,则x+y+z/3x-y+z=?