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-5(6n-6)=90
We move all terms to the left:
-5(6n-6)-(90)=0
We multiply parentheses
-30n+30-90=0
We add all the numbers together, and all the variables
-30n-60=0
We move all terms containing n to the left, all other terms to the right
-30n=60
n=60/-30
n=-2
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