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13=-3-4n
We move all terms to the left:
13-(-3-4n)=0
We add all the numbers together, and all the variables
-(-4n-3)+13=0
We get rid of parentheses
4n+3+13=0
We add all the numbers together, and all the variables
4n+16=0
We move all terms containing n to the left, all other terms to the right
4n=-16
n=-16/4
n=-4
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