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13=3n+6-5n
We move all terms to the left:
13-(3n+6-5n)=0
We add all the numbers together, and all the variables
-(-2n+6)+13=0
We get rid of parentheses
2n-6+13=0
We add all the numbers together, and all the variables
2n+7=0
We move all terms containing n to the left, all other terms to the right
2n=-7
n=-7/2
n=-3+1/2
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