What is the additive inverse of -7?

The additive inverse of a number is a characteristic of a number that relates it to the additive identity, zero. Every number has an additive inverse, and finding it is simply a matter of being familiar with addition of positive and negative numbers. Let x be the additive inverse, then the following equation must be true:

x + − 7 = 0

Add 7 to both sides:

x = 7 is the additive inverse.

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