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54=7n-2
We move all terms to the left:
54-(7n-2)=0
We get rid of parentheses
-7n+2+54=0
We add all the numbers together, and all the variables
-7n+56=0
We move all terms containing n to the left, all other terms to the right
-7n=-56
n=-56/-7
n=+8
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