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-6n+15=-8n+25
We move all terms to the left:
-6n+15-(-8n+25)=0
We get rid of parentheses
-6n+8n-25+15=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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