如果x/2=y/3=z/4,且x+y+z=18,那么x+y-z=?
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如果x/2=y/3=z/4,且x+y+z=18,那么x+y-z=?
如果x/2=y/3=z/4,且x+y+z=18,那么x+y-z=?
如果x/2=y/3=z/4,且x+y+z=18,那么x+y-z=?
如果x/2=y/3=z/4,且x+y+z=18,那么x+y-z=?
如果x/2=y/3=z/4,且x+y+z=18,那么x+y-z=?
如果x/2=y/3=z/4,且x+y+z=18,那么x+y-z=?