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2.1n-3.2=7.5
We move all terms to the left:
2.1n-3.2-(7.5)=0
We add all the numbers together, and all the variables
2.1n-10.7=0
We move all terms containing n to the left, all other terms to the right
2.1n=10.7
n=10.7/2.1
n=5+0.2/2.1
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