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8n-7=5n-13
We move all terms to the left:
8n-7-(5n-13)=0
We get rid of parentheses
8n-5n+13-7=0
We add all the numbers together, and all the variables
3n+6=0
We move all terms containing n to the left, all other terms to the right
3n=-6
n=-6/3
n=-2
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