若X/Y+Z=Y/Z+X=Z/X+Y=K,求K的值.请问这道题怎么写?
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(x+y-z)(x-y+z)=
x+z/y=x+y/z=y+z/x=k
x+y/z=y+z/x=z+x/y=k怎么做
X+Y+Z=?
x/y=(x+z)/(y+z)y/z=(x+y)/(x+z)
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