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0.5n+12.75n=15
We move all terms to the left:
0.5n+12.75n-(15)=0
We add all the numbers together, and all the variables
13.25n-15=0
We move all terms containing n to the left, all other terms to the right
13.25n=15
n=15/13.25
n=1+1/7.5714285714286
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