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8(n-9)=-128
We move all terms to the left:
8(n-9)-(-128)=0
We add all the numbers together, and all the variables
8(n-9)+128=0
We multiply parentheses
8n-72+128=0
We add all the numbers together, and all the variables
8n+56=0
We move all terms containing n to the left, all other terms to the right
8n=-56
n=-56/8
n=-7
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