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2.8-5.5n-4n=6
We move all terms to the left:
2.8-5.5n-4n-(6)=0
We add all the numbers together, and all the variables
-9.5n-3.2=0
We move all terms containing n to the left, all other terms to the right
-9.5n=3.2
n=3.2/-9.5
n=-1/2.96875
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