Question

Simplify combining the like terms: (i) a – (a – b) – b – (b – a)

Answer 1

Explanation:

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

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

= a - b

Answer 2

Hello !

`a - (a - b) - b - (b - a)\\\\= a - a + b - b - b+a\\\\\boxed{= a - b}`