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3.5=n+1.5
We move all terms to the left:
3.5-(n+1.5)=0
We get rid of parentheses
-n-1.5+3.5=0
We add all the numbers together, and all the variables
-1n+2=0
We move all terms containing n to the left, all other terms to the right
-n=-2
n=-2/-1
n=+2
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