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275+n+250+n+250+n=2000
We move all terms to the left:
275+n+250+n+250+n-(2000)=0
We add all the numbers together, and all the variables
3n-1225=0
We move all terms containing n to the left, all other terms to the right
3n=1225
n=1225/3
n=408+1/3
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