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-4n+3n=-8+4n-12
We move all terms to the left:
-4n+3n-(-8+4n-12)=0
We add all the numbers together, and all the variables
-4n+3n-(4n-20)=0
We add all the numbers together, and all the variables
-1n-(4n-20)=0
We get rid of parentheses
-1n-4n+20=0
We add all the numbers together, and all the variables
-5n+20=0
We move all terms containing n to the left, all other terms to the right
-5n=-20
n=-20/-5
n=+4
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