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2.5+0.15=0.4n
We move all terms to the left:
2.5+0.15-(0.4n)=0
We add all the numbers together, and all the variables
-(+0.4n)+2.5+0.15=0
We add all the numbers together, and all the variables
-(+0.4n)+2.65=0
We get rid of parentheses
-0.4n+2.65=0
We move all terms containing n to the left, all other terms to the right
-0.4n=-2.65
n=-2.65/-0.4
n=6+0.25/0.4
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