-n+-n=-2n so -1+-1=-2. In simple terms a negative plus a negative eqauls a negative. You can just add the numbers as if they are positive and then add a negative sign to the answer.
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No, a negative plus a negative is a negative
A negative plus a negative equals a negative.
A negative plus a negative still gives a negative answer.
The total sum is -12 or negative twelve.
Negative seven plus negative seven is negative fourteen.