(10x+y)-(10y+x)化简

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(10x+y)-(10y+x)化简(10x+y)-(10y+x)化简(10x+y)-(10y+x)化简(10x+y)-(10y+x)=10x+y-10y-x=9x-9y=10x+y-10y-x=9x-

(10x+y)-(10y+x)化简
(10x+y)-(10y+x)化简

(10x+y)-(10y+x)化简
(10x+y)-(10y+x)=10x+y-10y-x=9x-9y

=10x+y-10y-x
=9x-9y

(10x+y)-(10y+x)=10x+y-10y-x =(10x-x)+(10y-y)=9x+9y

化简