1.

A-[b-c-{a-(c-b-a)}],simplify it.

Answer»

Answer:

3a

Step-by-step explanation:

==: a - [B - c - {a - (c - b - a)}]

==: a - [b - c - {a - c + b + a}]

==: a - [b - c - {2A - c + b}]

==: a - [b - c - 2a + c - b]

==: a - [-2a]

==: a + 2a

==: 3a

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