Question

3a-b+(5a-3b+3)先去括号，在合并同类项，怎么解？

完整一点，谢谢，半个小时之类。

Answer 1

3a－b－5a+3b－3(去括号时括号里负变正正变负)合并同类项得－2a+2b－3

Answer 2

3a-b+(5a-3b+3)
=3a-b-5a-3b+3
=(3-5)a-(1-3)b+3
=-2a-(-2b)+3
=-2a+2b+3

Answer 3

3a-b+(5a-3b+3)
=3a-b-5a-3b+3
=(3-5)a-(1-3)b+3
=-2a-(-2b)+3
=-2a+2b+3
谢谢!

Answer 4

3a-b-5a+3b-3
(3+5)a-(1-3)b-3
8a-3b-3

Answer 5

=3a-b+5a-3b+3
=8a-4b+3