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18 February, 05:33

5 - 7 (-6x + 9z) use x = 7 and z = 6

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Answers (2)
  1. 18 February, 05:58
    0
    Answer: I believe it is - 79
  2. 18 February, 07:11
    0
    I believe the answer is - 24.

    You start in the parentheses, multiplying - 6 by 7, which comes to - 42. You also multiply 9 by 6, coming to 54.

    This makes the expression 5-7 (-42+54)

    Continuing in the parentheses, we add - 42 and 54, which is the same as subtracting 42 from 54, which comes to 12.

    5-7 is - 2.

    The last thing we need to do is multiply - 2 by 12, which comes to - 24.
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