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-13=-1n+4n-4
We move all terms to the left:
-13-(-1n+4n-4)=0
We add all the numbers together, and all the variables
-(3n-4)-13=0
We get rid of parentheses
-3n+4-13=0
We add all the numbers together, and all the variables
-3n-9=0
We move all terms containing n to the left, all other terms to the right
-3n=9
n=9/-3
n=-3
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