18 February, 05:33
5 - 7 (-6x + 9z) use x = 7 and z = 6
18 February, 05:58
Answer: I believe it is - 79
18 February, 07:11
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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