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19-3n-19n=-19-20n
We move all terms to the left:
19-3n-19n-(-19-20n)=0
We add all the numbers together, and all the variables
-3n-19n-(-20n-19)+19=0
We add all the numbers together, and all the variables
-22n-(-20n-19)+19=0
We get rid of parentheses
-22n+20n+19+19=0
We add all the numbers together, and all the variables
-2n+38=0
We move all terms containing n to the left, all other terms to the right
-2n=-38
n=-38/-2
n=+19
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