已知:x-2xy-8y=0(x≠0,y≠0),则代数式2x+3y/2y=
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已知3+XY-2y=0(x≠0,Y≠0)求x/y-y/x-x+y/xy
已知:x-2xy-8y=0(x≠0,y≠0),则代数式2x+3y/2y=
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