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+1+4+7=-7N-4N
We move all terms to the left:
+1+4+7-(-7N-4N)=0
We add all the numbers together, and all the variables
-(-11N)+1+4+7=0
We add all the numbers together, and all the variables
-(-11N)+12=0
We get rid of parentheses
11N+12=0
We move all terms containing N to the left, all other terms to the right
11N=-12
N=-12/11
N=-1+1/11
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