若X:Y:Z=2:3:4求X+Y+Z/X-2Y+3X的值
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x+2y=3x+2z=4y+z 求x:y:z
已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z
若x/3=y/4=z/5,求x+y+z/3x-2y+z的值.
若x:y:z=2:3:4,求x+y+z/x-2y+3z的值
若x/2=y/3=z/4不等于0,求x+y+z/x+y-z的值
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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
(x*x+2)(y*y+4)(z*z+8)=64xyz,求x,y,z
已知x/2=y/4=z/7,求①x:y:z.②若2x+y+3z=58,分别求x,y,z的值.③求x+y/x+z的值.
设|x|-|y|+|z|=|x+y+z|,且|x+y|=4,|y+z|=5,|y|=3,求(x-y-z)^2的值
1.若3x-2y+z=2;3x+2y+5z=4,求x+22.若x-3y+z=0;3x-3y-4z=0,求x:y:z
若X:Y:Z=2:3:4求X+Y+Z/X-2Y+3X的值
x,y,z不是0.3z=4y,z=3x求(x+y):(x+z).
若x+y+z=3y=2z,则x/x+y+z=?
若x,y,z成等差数列,则(z-x)^2-4(x-y)(y-z)=
x+y/2=z+x/3=y+z/4 x+y+z=27