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2.5n+7=n+19
We move all terms to the left:
2.5n+7-(n+19)=0
We get rid of parentheses
2.5n-n-19+7=0
We add all the numbers together, and all the variables
1.5n-12=0
We move all terms containing n to the left, all other terms to the right
1.5n=12
n=12/1.5
n=8
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