若x-y+2=6/5,则25(y-x-2)=_.

问题描述:

若x-y+2=

6
5
,则25(y-x-2)=______.

∵25(y-x-2)=-25(x-y+2),
而x-y+2=

6
5

∴25(y-x-2)=-25×
6
5
=-30.
故答案为:-30.