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400=12n+50
We move all terms to the left:
400-(12n+50)=0
We get rid of parentheses
-12n-50+400=0
We add all the numbers together, and all the variables
-12n+350=0
We move all terms containing n to the left, all other terms to the right
-12n=-350
n=-350/-12
n=29+1/6
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