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n+4=-19+2n
We move all terms to the left:
n+4-(-19+2n)=0
We add all the numbers together, and all the variables
n-(2n-19)+4=0
We get rid of parentheses
n-2n+19+4=0
We add all the numbers together, and all the variables
-1n+23=0
We move all terms containing n to the left, all other terms to the right
-n=-23
n=-23/-1
n=+23
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