![a -\{ a - [ a- (2a - b) + 3a ]\}=\\ a -\{ a - [ a- 2a + b + 3a ]\}=\\ a -\{ a - [ 2a+b ]\}=\\ a -\{ a - 2a - b \}=\\ a -\{ - a- b \}=\\ a+a+b=\\ 2a+b](/tpl/images/0184/7155/e776d.png)
Remove all grouping symbols and combine like terms,
a - { a - [ a- (2a - b) + 3a ]}...
Mathematics, 21.08.2019 12:20 jayleengrant
Remove all grouping symbols and combine like terms,
a - { a - [ a- (2a - b) + 3a ]}
Answers: 1
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