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256+(15+n)=(256+15)+2
We move all terms to the left:
256+(15+n)-((256+15)+2)=0
We add all the numbers together, and all the variables
(n+15)+256-(271+2)=0
We add all the numbers together, and all the variables
(n+15)-17=0
We get rid of parentheses
n+15-17=0
We add all the numbers together, and all the variables
n-2=0
We move all terms containing n to the left, all other terms to the right
n=2
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