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35=2.25n+5.75
We move all terms to the left:
35-(2.25n+5.75)=0
We get rid of parentheses
-2.25n-5.75+35=0
We add all the numbers together, and all the variables
-2.25n+29.25=0
We move all terms containing n to the left, all other terms to the right
-2.25n=-29.25
n=-29.25/-2.25
n=+13
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