a - [b - {a – (6-1)+3a}]
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Answer:
5a - b -5
Explanation:
a - [b - {a – (6-1)+3a}]
= a - [ b - {a - 5 + 3a}]
= a - [ b - { 4a -5 }]
= a - [ b - 4a + 5}]
= a - b + 4a -5
= 5a - b -5
= 5a - 5 - b
= 5 (a-1) - b
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