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01-11-2016
Mathematics

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find the sum and express it in simplest form?
(-b-c+8)+(7b-7c-9)

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Аноним Аноним

01-11-2016

-b + 7b = 6b
-c + (-7c) = -8c
8 + (-9) = -1

therefore the answer 6b - 8c - 1

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