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-21n-58=n+646
We move all terms to the left:
-21n-58-(n+646)=0
We get rid of parentheses
-21n-n-646-58=0
We add all the numbers together, and all the variables
-22n-704=0
We move all terms containing n to the left, all other terms to the right
-22n=704
n=704/-22
n=-32
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