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24 December, 04:22

Simplify a - {b - [c - (d - e) - f] - g}.

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  1. 24 December, 04:36
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    The key is to work from the middle.

    c - (d - e) - f = c - d + e - f

    b - (c - d + e - f) - g = b - c + d - e + f - g

    a - (b - c + d - e + f - g) = a - b + c - d + e - f + g

    Answer:

    a - b + c - d + e - f + g
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