give answer of this sum
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2a - [4b - {4a - (3b - 2a + 2b)}] [Vinculum on 2a + 2b]
We remove the vinculum which causes the "+ 2b" to become "- 2b":
2a - [4b - {4a - (3b - 2a - 2b)}]
2a - [4b - {4a - (b - 2a)}]
2a - [4b - {4a - b + 2a}]
2a - [4b - {6a - b}]
2a - [4b - 6a + b]
2a - [5b - 6a]
2a - 5b + 6a
8a - 5b ans
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