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50=105n-5240
We move all terms to the left:
50-(105n-5240)=0
We get rid of parentheses
-105n+5240+50=0
We add all the numbers together, and all the variables
-105n+5290=0
We move all terms containing n to the left, all other terms to the right
-105n=-5290
n=-5290/-105
n=50+8/21
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