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11+7.1n=9+7.5n
We move all terms to the left:
11+7.1n-(9+7.5n)=0
We add all the numbers together, and all the variables
7.1n-(7.5n+9)+11=0
We get rid of parentheses
7.1n-7.5n-9+11=0
We add all the numbers together, and all the variables
-0.4n+2=0
We move all terms containing n to the left, all other terms to the right
-0.4n=-2
n=-2/-0.4
n=+5
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