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-13n+3=-12n+19
We move all terms to the left:
-13n+3-(-12n+19)=0
We get rid of parentheses
-13n+12n-19+3=0
We add all the numbers together, and all the variables
-1n-16=0
We move all terms containing n to the left, all other terms to the right
-n=16
n=16/-1
n=-16
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