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6n-30=-2n+18
We move all terms to the left:
6n-30-(-2n+18)=0
We get rid of parentheses
6n+2n-18-30=0
We add all the numbers together, and all the variables
8n-48=0
We move all terms containing n to the left, all other terms to the right
8n=48
n=48/8
n=6
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