-2n- (3n-1)如何化简只要化简

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-2n- (3n-1)如何化简只要化简

-2n- (3n-1)如何化简只要化简
-2n- (3n-1)如何化简
只要化简

-2n- (3n-1)如何化简只要化简
-2n- (3n-1)
=-2n-3n+1
=-5n+1

-2n- (3n-1
=-2n-3n+1
= -5n+1