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-9(6+n)=-99
We move all terms to the left:
-9(6+n)-(-99)=0
We add all the numbers together, and all the variables
-9(n+6)-(-99)=0
We add all the numbers together, and all the variables
-9(n+6)+99=0
We multiply parentheses
-9n-54+99=0
We add all the numbers together, and all the variables
-9n+45=0
We move all terms containing n to the left, all other terms to the right
-9n=-45
n=-45/-9
n=+5
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