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-7n/2=63
We move all terms to the left:
-7n/2-(63)=0
We multiply all the terms by the denominator
-7n-63*2=0
We add all the numbers together, and all the variables
-7n-126=0
We move all terms containing n to the left, all other terms to the right
-7n=126
n=126/-7
n=-18
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