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-21n-49=-31-5
We move all terms to the left:
-21n-49-(-31-5)=0
We add all the numbers together, and all the variables
-21n-49-(-36)=0
We add all the numbers together, and all the variables
-21n-13=0
We move all terms containing n to the left, all other terms to the right
-21n=13
n=13/-21
n=-13/21
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