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25 August, 22:57

If a + b + c = - 1 and x + y = 7

what is - 9a-7x-9c-9b-7y

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Answers (2)
  1. 25 August, 23:06
    0
    -40

    Step-by-step explanation:

    -9a-7x-9c-9b-7y

    group the terms

    -9a-9b-9c - 7x-7y

    factor out - 9 and 7

    -9 (a+b+c) - 7 (x+y)

    replace a+b+c with - 1 and x+y with 7

    -9 (-1) - 7 (7)

    9 - 49

    -40
  2. 26 August, 01:23
    0
    If a + b + c = - 1 and x + y = 7

    what is - 9a-7x-9c-9b-7y

    answer:40
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