Respuesta :

thnkgod4deadpool
6  the answer is 6. =+}                                                                                                                 
apologiabiology
n is the number
-n is the oposite of that number


1+(-n)=7
1-n=7
minus 1 from both sides
1-1-n=7-1
0-n=6
-n=6
times -1 both sides
n=-6
her number is -6

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