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-13+n-3n=n-3-5n
We move all terms to the left:
-13+n-3n-(n-3-5n)=0
We add all the numbers together, and all the variables
n-3n-(-4n-3)-13=0
We add all the numbers together, and all the variables
-2n-(-4n-3)-13=0
We get rid of parentheses
-2n+4n+3-13=0
We add all the numbers together, and all the variables
2n-10=0
We move all terms containing n to the left, all other terms to the right
2n=10
n=10/2
n=5
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