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39+2.50n=51.50
We move all terms to the left:
39+2.50n-(51.50)=0
We add all the numbers together, and all the variables
2.50n+39-(51.5)=0
We add all the numbers together, and all the variables
2.50n-12.5=0
We move all terms containing n to the left, all other terms to the right
2.50n=12.5
n=12.5/2.50
n=5
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