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124.2+47.5-n=161.1
We move all terms to the left:
124.2+47.5-n-(161.1)=0
We add all the numbers together, and all the variables
-1n+10.6=0
We move all terms containing n to the left, all other terms to the right
-n=-10.6
n=-10.6/-1
n=10+0.6/1
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