已知x=y/3=z/5.且x+y-2z不等于0.求2x+3y-z/x+y-2z的值是多少
3个回答
已知x=y/3=z/5 且x+y-2z不等于0
那么y=3x z=5x
(2x+3y-z)/(x+y-2z)
=(2x+9x-5x)/(x+3x-10x)
=6x/(-6x)
= -1
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