已知X05-XY=7,XY-Y05=4,则X05-Y05=
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已知X05-XY=7,XY-Y05=4,则X05-Y05=
已知X05-XY=7,XY-Y05=4,则X05-Y05=
已知X05-XY=7,XY-Y05=4,则X05-Y05=
X05-XY=7
XY-Y05=4
两式相加得X05-Y05=11
已知X05-XY=7,XY-Y05=4,则X05-Y05=
已知X05-XY=7,XY-Y05=4,则X05-Y05=
已知X05-XY=7,XY-Y05=4,则X05-Y05=
X05-XY=7
XY-Y05=4
两式相加得X05-Y05=11