Question

1a + 1b - ( 1a - 1b ) ​

Answer 1

1a + 1b - ( 1a - 1b )

=a+b-a+b

=2b

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Answer 2

1a + 1b - (1a-1b)

1a + 1b - 1a + 1b

1a + 1b

2a

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