Answer:
9
Explanation:
-6 + -3 - (-18)
-6 - 3 + 18
-9 + 18
- (-) = +
+ (+) = +
- (+) = -
+ (-) = -
The answer to this problem is 9.
-6+(-3)-(-18)
Since (+)(-)=(-) and (-)(-)=(+),
-6-3+18
-9+18
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