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levacccp [35]
4 years ago
11

Remove all grouping symbols and combine like terms,a - { a - [ a- (2a - b) + 3a ]}

Mathematics
2 answers:
Neporo4naja [7]4 years ago
7 0
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
Nikitich [7]4 years ago
3 0
<span>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

</span>
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