Question

Simplify: a - (a - b) + b - (b - a)
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Answer 1

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

= a - a + b + b - b + a

= a + b

Answer 2

$\huge\mathcal\red{Answer}$

$a - (a - b) + b - (b - a) \\ = a - a + b + b - b + a \\ = a + b$

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