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17.50n-30=57.50
We move all terms to the left:
17.50n-30-(57.50)=0
We add all the numbers together, and all the variables
17.50n-30-(57.5)=0
We add all the numbers together, and all the variables
17.50n-87.5=0
We move all terms containing n to the left, all other terms to the right
17.50n=87.5
n=87.5/17.50
n=5
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