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Question
Simplify:
`"a"−[−{−(a−overline("b"-"c"))}]`
Sum
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Solution
`"a"−[−{−(a−overline("b"-"c"))}]`
= a − [− {− (a − b + c)}]
= a − [− {− a + b − c}]
= a − [+ a − b + c]
= a − a + b − c
= b − c
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