7 + (-9) = 7 - 9 = -2
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When adding a negative to a positive, the answer is positive if the positive is greater, and negative if the negative is greater. In other words, subtract the smaller from the larger and take the sign of the larger. Example: -7 + 9 = +2 Example: -9 + 7 = -2
a positive plus a negative is a positive example 9-(-2) you would change the double negative to a positive hope this helped :)
negative 9
-9 + 9 = 0
1 plus negative 10 is equal to -9.