-3a+5a-4a+6a;-3a+5a-4a+6a
问题描述:
-3a+5a-4a+6a;-3a+5a-4a+6a
答
-3a+5a-4a+6a
=-7a+11a
=4a
-3a+5a-4a+6a;-3a+5a-4a+6a
-3a+5a-4a+6a
=-7a+11a
=4a