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2n+3.5=6.9
We move all terms to the left:
2n+3.5-(6.9)=0
We add all the numbers together, and all the variables
2n-3.4=0
We move all terms containing n to the left, all other terms to the right
2n=3.4
n=3.4/2
n=1+1/1.42857142857
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