Simplify. a - {4 b - [ a - (5 b - c ) + 3 c - ( a - b - 9 c )]}

1 answer:

7 0

The answer to this should be a-8b+13c

a - {4b - [a - (5b - c) + 3c - (a - b - 9c)]}
=a - {4b - [a - 5b + c + 3c - a + b + 9c]}
=a - {4b - [- 4b+ 13c]}
=a - {4b + 4b -13c}
=a - 8b + 13c

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