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What does -9 plus -9 equals?

Updated: 4/28/2022
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Wiki User

13y ago

Best Answer

-18

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Loraine Quigley

Lvl 10
3y ago
This answer is:
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Wiki User

13y ago

adding a negative is the same thing as subtracting a positive.

so -9 + -9 is just like -9-9 = -18

hope this helped

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Q: What does -9 plus -9 equals?
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